Use the quadratic formula to find the solutions to the quadratic equation below x^2-5x-4=0

Use The Quadratic Formula To Find The Solutions To The Quadratic Equation Below X^2-5x-4=0

Answers

Answer 1

Answer:

comparing given quadratic equation x²-5x-4=0 with ax²+bx+c=0 we get,

a=1,b=-5,c=-4

Now,

x={-b±√b²-4ac}/2a

={-(-5)±√(-5)²-4×1×-4}/2×1

={5±√25+16}/2

=(5±√41)/2

Hence,B.is the correct option

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Related Questions

PLEASE HELP WITH THIS! PLEASE! SURFACE AREA. I HAVE NO CLUE!!​

Answers

Answer: 626 yd^2

Step-by-step explanation: First you need to split the figure into 2 rectangular prisms (see attached image). The tallest rectangular prism has a length of 12 yd, a width of 3 yd, and a height of 11 yd. The shorter one has a length of 12yd, a width of 4 yd, and a height of 4 yd. The surface area equation is SA=2(wl+hl+hw). First solve for the taller rectangular prism. SA=2(3x12+11x12+11x3). SA=2(36+132+33). SA=2(201). SA=402 yd^2. Now solve for the smaller rectangular prism. SA=2(4x12+4x12+4x4). SA=2(48+48+16). SA=2(112). SA=224 yd^2. Lastly, add both values together. 402+224=626 yd^2.

100 Points! Algebra question. Photo attached. Find the exact value of the expression. Please show as much work as possible. Thank you!

Answers

The required exact value of sin(585 degrees) is -0.707

The sine function is periodic with a period of 360 degrees.
Therefore,
= sin(585 degrees)
= sin(585 degrees - 360 degrees)
= sin(225 degrees).

The sine function has a negative value in the third quadrant, and 225 degrees is in the third quadrant.
Therefore,
sin(225 degrees) = -sin(45 degrees)
                             = -(1/sqrt(2)) = -0.7071.

Therefore, the exact value of sin(585 degrees) is -0.7071.

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I just need someone to draw the tree diagram for the picture below not to much

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According to the information, there are thousands of different lunch options in this restaurant.

How to calculate the number of different lunches in the restaurant?

To calculate the number of different lunches in the restaurant we must carry out the following mathematical procedure. We must multiply the different options as shown below:

4 green options x 5 protein options x 8 vegetable options x 4 extra options x 6 topping options = 4 x 5 x 8 x 4 x 6 = 4,800 different lunch options.

Based on the above, we can infer that 4,800 different lunch options can be created with the available ingredients.

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This may be hard to put together, but I need help with an angle equation. I'm looking for example equations and how to do these types of equations. *please note that this equation is completely random and probably ends with an ugly number. it's just an example of a type of problem*

Answers

Example: (2x - 4) x=7 so (2x (x=7) - 4) =18

A cruise ship can cover 19 nautical miles in 437 minutes. How many nautical miles will it travel in 345 minutes?

Answers

The cruise ship will travel approximately 15 nautical miles in 345 minutes.

How did we get the value?

Use a proportion to solve this problem. Let "d" be the number of nautical miles the cruise ship will travel in 345 minutes. Then:

19 nautical miles / 437 minutes = d nautical miles / 345 minutes

To solve for "d", cross-multiply:

19 nautical miles x 345 minutes = d nautical miles x 437 minutes

Then, divide both sides by 437 minutes to isolate "d":

d nautical miles = (19 nautical miles x 345 minutes) / 437 minutes

Simplifying this expression, we get:

d nautical miles = 15 nautical miles (rounded to the nearest whole number)

Therefore, the cruise ship will travel approximately 15 nautical miles in 345 minutes.

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Before the new carpet is installed, all
the walls and the ceiling will be painted
with primer. If one gallon of primer
covers 300 square feet, how many
gallons of primer will be needed?
44 ft
8 ft
32 ft

Answers

You would need to purchase 6 gallons of primer.

Hi
Please help on question asap if the answer is correct I'll rate you five stars a thanks and maybe even brainliest!

What do you notice about the values?

0.9 amps ÷0.03v=30 ohms.
1.9amps÷0.07v=27.149 ohms
3.1. amps ÷0.10v =31 ohms
3.9. amps ÷ 0.12v =032.5 ohms
5. amps ÷0.15v=33.33 ohms
6.1. amps ÷0.19v=32.1053 ohms

Answers

In the given data, current and voltage are directly proportional, while the resistance is constant.

What is the relationship between current and voltage?

The relationship between the voltage, current, and resistance in an electric circuit is described by Ohm's Law.

The law states that the voltage across a circuit is directly proportional to the current flowing in the circuit.

V ∝ I

V = IR

where;

R is the resistance, the proportionality constant

From the given data set we can see that for each division of current by voltage we have almost a constant value of 30 ohms.

Thus, if we observe the values given in the data set, we can conclude that;

current and voltage are directly proportional, while the resistance is constant.

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A bag contains 14 blue marbles, 6 green marbles and 8 purple marbles. What is the likelihood of randomly drawing a blue marble?

Answers

Answer:

0

Step-by-step explanation:

because 6 plus 8 eqaul 14

The slope of a line of best fit is undefined when _____.
select all that apply

(1) the x values of the data set are constant
(2) the y values of the data set do not change when the x values change
(3) the slope of the line of best fit is vertical
(4) the slope is of the line of best fit is horizontal.
(5) the x values of the data set increase at an unspecified rate as the y values decrease

Answers

The slope of a line of best fit is undefined when the slope is of the line of best fit is horizontal. This is because a horizontal line has a slope of zero

The slope of a line of best fit is undefined when the slope is of the line of best fit is horizontal. A line of best fit is a straight line that is used to represent the data on a scatter plot. It is the line that best fits the data points in a scatter plot.

The slope of a line of best fit is the rate of change of the y-coordinate relative to the x-coordinate.. In other words, there is no rate of change of the y-coordinate relative to the x-coordinate when the line is horizontal.

The x values of the data set increase at an unspecified rate as the y values decrease. This means that the line of best fit has a negative slope. A negative slope means that the y-coordinate decreases as the x-coordinate increases.

In other words, there is a rate of change of the y-coordinate relative to the x-coordinate. The slope of the line of best fit is the value of this rate of change.

The slope of a line of best fit is used to determine the direction and strength of the relationship between two variables.

A positive slope means that the variables are directly proportional, while a negative slope means that they are inversely proportional. The slope of a line of best fit can be calculated using the formula y2 - y1 / x2 - x1.

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A simple gable roof is to cover a span of 32 feet. If it is to have a 7:12 pitch, how tall will the ridgeline be above the house?​

Answers

The ridgeline will be 18.67 feet above the house.

What will be the height of the ridgeline above the house?

Generally, a height refers to the measurement of someone or something from head to foot or from base to top.

To find the height of the ridgeline, we will use the formula: Height = (Pitch / 12) * Span

Given data:

Pitch = 7

Span = 32 feet

Inputting the values, we have:

Height = (7 / 12) * 32

Height = 0.5833 * 32

Height = 18.6656

Height = 18.67 feet.

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Identify one example of each angle pair in the diagram to the right.

Answers

Alternate exterior angles are ∠9 and (∠1 + ∠2)

Consecutive interior angles are ∠7 and ∠4

Consecutive exterior angles are ∠9 and ∠∠3

Vertical angles are ∠2 and ∠5

Linear pairs are ∠7 and ∠8

We have,

Alternate exterior angles: Pairs of angles on opposite sides of a transversal line, formed by two parallel lines, and located outside the intersected lines.

Consecutive interior angles: Pairs of angles on the same side of a transversal line, formed by two parallel lines, and located between the intersected lines.

Consecutive exterior angles: Pairs of angles on the same side of a transversal line, formed by two parallel lines, and located outside the intersected lines.

Vertical angles: Pairs of non-adjacent angles formed by the intersection of two lines, sharing the same vertex and having equal measures.

Linear pair: A pair of adjacent angles formed by the intersection of two lines, sharing a common side, and whose measures add up to 180 degrees.

So,

Alternate exterior angles

= ∠9 and (∠1 + ∠2)

Consecutive interior angles

= ∠7 and ∠4

Consecutive exterior angles

= ∠9 and ∠∠3

Vertical angles

= ∠2 and ∠5

Linear pair

= ∠7 and ∠∠8

Thus,

Alternate exterior angles are ∠9 and (∠1 + ∠2)

Consecutive interior angles are ∠7 and ∠4

Consecutive exterior angles are ∠9 and ∠∠3

Vertical angles are ∠2 and ∠5

Linear pairs are ∠7 and ∠8

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22. Which of the following is NOT a rational expression?
O(x+3)(2x-1)
x+3
O3x²+3x
4x+5
3x+4√x-7
2x+2
2x²-3x³+5
5x

Answers

The correct expression which is not a rational expression,

⇒ (x+3)(2x-1) / (x+3)

We have to given that;

All the expressions are,

⇒ (x+3)(2x-1) / (x+3)

⇒ (3x²+3x) / (4x+5)

⇒ (3x+4√x-7) / (2x+2)

⇒ (2x²-3x³+5) / 5x

Since, A number which can be written in the form of fraction p / q , where q is non zero, are called Rational numbers.

Hence, We can simplify all the expressions as,

⇒ (x+3)(2x-1) / (x+3)

⇒ (2x - 1)

Hence, It is not a rational expression.

⇒ (3x²+3x) / (4x+5)

⇒ 3x (x + 1) / (4x + 5)

Hence, It is a rational expression.

⇒ (3x+4√x-7) / (2x+2)

⇒ (3x + 4√x - 7) / 2 (x + 1)

Hence, It is a rational expression.

⇒ (2x²-3x³+5) / 5x

Hence, It is a rational expression.

Thus, The correct expression which is not a rational expression,

⇒ (x+3)(2x-1) / (x+3)

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which cellphone srvice provider was the first to be established in south africa

Answers

The first cellphone service provider to be established in South Africa was Vodacom. Vodacom was launched on April 1, 1994, and it became the country's first cellular network operator.

The company was a joint venture between Telkom, the national telecommunications company of South Africa, and Vodafone, a global telecommunications giant.

Vodacom introduced the GSM network to South Africa, providing mobile voice and data services to customers across the country. Its launch marked a significant milestone in the telecommunications industry in South Africa, as it brought mobile communication to the masses and revolutionized the way people connect and communicate.

Since its inception, Vodacom has played a pivotal role in the development of the telecommunications sector in South Africa. It has continually expanded its network coverage, introduced innovative services, and played an active role in bridging the digital divide in the country.

Today, Vodacom remains one of the leading mobile network operators in South Africa, providing a wide range of mobile services to millions of customers.

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The probable question may be:

Which cellphone service provider was the first to be established in south africa

area of a floor 19m by 12 m is

Answers

Answer:228m

Step-by-step explanation: 19m x 12m = 228m

Answer: 228m

Step-by-step explanation: Just multiply 19m by 12m. That's how you find area.

What is the intermediate step in the form (x+a)^2=b as a result of complementing the square for the following equations

Answers

The intermediate step in the form (x+a)²=b as a result of completing the square for the equation x² + 2x = 319 is (x+1)² = 320.

To use completing the square to solve the equation x² + 2x = 319, we have to write the left-hand side of the equation as a perfect square.

Add the square of half of the coefficient of x to both sides of the equation:

x² + 2x + (2/2)² = 319 + (2/2)²

x² + 2x + 1 = 320

The left-hand side of the equation can now be factored as a perfect square:

(x+1)² = 320

This is the equation in the form (x+a)²=b, where a=1 and b=320.

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The complete question is as follows:

What is the intermediate step in the form (x+a)²=b as a result of complementing the square for the following equation?

x² + 2x = 319

In the figure, what percentage of the circles are shaded?

Answers

25% because if 3/12 of the circles are shaded, that simplifies to 1/4. 1/4 is equal to 25%

Answer: E. 25%

Step-by-step explanation: There are 12 circles in total. 3 out of those twelve are shaded in, making it in fraction form 3/12. dividing both the numerator in the denominator by 3 simplifies it into 1/4. which is subsequently, 25%

can somebody please help me with this asap!

Answers

The diameter of the second pile of phosphate is 53.5 ft.

We have,

Conveyor belt:

Cone shape:

Diameter = 48.6 ft

Radius = D/2 = 24.3 ft

Height = 15.3 ft

Volume.

= 1/3 x π x r² x h

= 1/3 x 3.14 x 24.3 x 24.3 x 15.3______(1)

Shorter conveyor belt:

Cone shape:

Diameter = D

Height = (15.3 - 2.7) = 12.6 ft

Volume.

= 1/3 x π x (D/2)² x h

= 1/3 x 3.14 x (D/2)² x 12.6_______(2)

Since (1) and (2) are equal.

24.3 x 24.3 x 15.3 = (D/2)² x 12.6

(D/2)² = 717.02

D²/4 = 717.02

D² = 717.02 x 4

D² = 2868.09

D = 53.55

D = 53.5 ft

Thus,

The diameter of the second pile of phosphate is 53.5 ft.

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I need help please guys

Answers

The solution is :

After the row operation replaces the second row, the augmented matrix is : [tex]\left[\begin{array}{ccc}-6 &3& -4 \\0&-3&11\end{array}\right][/tex]

 

Here, we have,

The designated sum can replace either row. Consult your curriculum materials for the intent.

Here, we'll replace row 2 with the sum.

 3(2, -2, 5) +(-6, 3, -4) = (3(2)-6, 3(-2)+3, 3(5)-4) = (0, -3, 11)

After the row operation replaces the second row, the augmented matrix is ... [tex]\left[\begin{array}{ccc}-6 &3& -4 \\0&-3&11\end{array}\right][/tex]

Hence, The solution is :

After the row operation replaces the second row, the augmented matrix is : [tex]\left[\begin{array}{ccc}-6 &3& -4 \\0&-3&11\end{array}\right][/tex]

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How long must 100 be invested at a rate of 4% to earn 32.00 in interest

Answers

It is 10% lomg because I need to add both sides

(b) The co-ordinates of three points are A(7, 4), B(-1, -2) and C(3t, 5-4t). (i) Find the value of t if the three points are collinear.​

Answers

Answer:

Step-by-step explanation:

To determine the value of t if the three points A(7, 4), B(-1, -2), and C(3t, 5-4t) are collinear, we can use the concept of slope. If the points are collinear, the slopes between any two pairs of points should be equal.

The slope between points A and B is given by:

m₁ = (y₂ - y₁) / (x₂ - x₁)

= (-2 - 4) / (-1 - 7)

= (-6) / (-8)

= 3/4

Now, let's calculate the slope between points B and C:

m₂ = (y₂ - y₁) / (x₂ - x₁)

= (5 - (-2)) / (3t - (-1))

= (7) / (3t + 1)

Since the points are collinear, the slopes m₁ and m₂ should be equal. Therefore, we can set up the equation:

3/4 = 7 / (3t + 1)

To solve for t, we can cross-multiply and solve the resulting equation:

4(7) = 3(3t + 1)

28 = 9t + 3

25 = 9t

t = 25 / 9

Therefore, the value of t that makes the points A(7, 4), B(-1, -2), and C(3t, 5-4t) collinear is t = 25/9.

Answer:

6/7

Step-by-step explanation:

If the three points are collinear, then the slope of the line passing through any two of the points should be the same as the slope of the line passing through the other two points.

Let's find the slope of the line passing through points A and B:

slope AB = (y2-y1)/(x2-x1)

= (-2-4)/(-1-7)

= -6/-8

= 3/4

Now let's find the slope of the line passing through points B and C:

slope BC = (y2-y1)/(x2-x1)

= (5-4t-(-2))/(3t-(-1))

= (7-4t)/(3t+1)

Since the three points are collinear, slope AB = slope BC:

3/4 = (7-4t)/(3t+1)

Cross-multiplying and simplifying:

12t + 4 = 28-16t

28t = 24

t = 24/28

t = 6/7

Therefore, the value of t is 6/7 if the three points A, B, and C are collinear.

100 Points! Geometry question. Photo attached. Please show as much work as possible. Thank you!

Answers

Answer:

2=a

7=b

Step-by-step explanation:

a+14=6a+4

-a  

14=5a+4

-4

10=5a

/5

2=a

9b+8=10b+1

-1

9b+7=10b

-9b

7=1b

/1

7=b

Answer:

WZ=7

XY=7

WX=2

ZY=2

Step-by-step explanation:

9b+8=10b+1

Take 9b to 10b and 1 to 8 to form the equation

8 - 1 =10b - 9b

7 = b

a + 14 =6a + 4

Take a to 6a and 4 to 14 to form the equation

14 - 4 =6a - a

10 =5a

Simplify the answer

10/5 =5a/5

Five divide by five 1 and 10 divided by 5 is 2

Answer is therfore

2 = a

Which of the following is an example of a statistical experiment?
A Twenty people in a neighborhood are asked if they want more streetlights on the street.
OB. More streetlights are installed on one street and people are then asked if they like the change.
OC. The number of accidents on the street is compared to last year's rate.
OD. People are asked to call a number to comment about the need for new streetlights.

Answers

Answer:

B. More streetlights are installed on one street and people are then asked if they like the change.

Step-by-step explanation:

An experiment is a type of research method that involves manipulating one or more variables and measuring their effects on other variables. In this case, the experiment is to change the color of the product packaging and see how many people like the change. This is because the outcome of the experiment (the number of people who like the change) depends on chance and can be measured using numerical data. The other options are not experiments, but surveys or observations. Surveys involve asking people questions and collecting their opinions or preferences. Observations involve watching and recording people's behavior or reactions without interfering with them.

4 3/8 + 5 1/2= in fractions

Answers

Answer:

9 7/8

Step-by-step explanation:

1. 4 3/8 can be converted into the improper fraction 35/8, and 5 1/2 can be converted into 11/2.

2. Now that we have 35/8 + 11/2, we have to find a common denominator. Since 2 goes into 8 four times, we can turn 11/2 into 44/8 by multiplying the numerator and denominator (the top and the bottom numbers) by 4.

3. Now we have 35/8 + 44/8. At this point, the all we have to do is add the numerators (the top numbers). 35+44=79, so our answer is 79/8, which we can simplify to 9 7/8.

Find the amount accumulated after
investing a principle P for t years at an
interest rate compounded k times per year.
P = $40,500 r = 3.8% t = 20 k = 12
Hint: A = P(1 + £)kt
A = $[?]

Answers

The solution is: the amount accumulated after investing a principle P for t years at an interest rate compounded k times per year is $86496.26.

Here, we know,

The whole sum borrowed (or invested), exclusive of interest and dividends.

We have,

The interest that is calculated using both the principal and the interest that has accrued during the previous period is called compound interest. It differs from simple interest in that the principal is not taken into account when determining the interest for the subsequent period with simple interest. Compound interest is commonly abbreviated C.I. in mathematics.

The formula for the amount A accumulated after investing a principle P for t years at an annual interest rate r compounded k times per year is:

A = P * (1+r / k)^kt

given that,

P = $40,500 r = 3.8% t = 20 k = 12

Substituting the given values into this formula, we have:

A = $40,500 * (1 + 0.038 / 12)^12*20

A = $40,500 * 2.1357

A = $86496.2599

A = $86496.26 (rounded to the nearest cent)

Therefore,  the amount accumulated after investing a principle P for t years at an interest rate compounded k times per year is $86496.26.

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Part of the population of 5,250 elk at a wildlife preserve is infected with a parasite. A random sample of 50 elk shows that 8 of them are infected. How many elk are likely to be infected? Based on the sample, there will likely be infected elk in the wildlife preserve.

Answers

The likely population of the infected elk in the wildlife preserve is 840.

What is the likely population of the infected elk?

A sample is a smaller group of the population. A sample is a representation of the population.

The fraction of infected elks in the sample to the total sample would be the same of the infected elks in the population to the total population of the elks.

Population of the infected elk = (infected elks in the sample / total sample) x number of elks in the preserve

(8/50) x 5250

= 0.16 x 5250 = 840

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A solid figure is separated into 2 rectangular prisms. The volume of rectangular prism A is 75 cubic yards. Rectangular prism
B has a length of 7 yards and a width of 3 yards. The total volume of the solid figure is 180 cubic yards. What is the height of
rectangular prism B?

Answers

The height of rectangular prism B is 5 yards.

Let's first find the volume of rectangular prism B:

The volume of the solid figure = Volume of prism A + Volume of prism B

180 = 75 + length × width × height of prism B

105 = length × width × height of prism B

We know that the length of prism B is 7 yards and the width is 3 yards,

Substitute those values:

105 = 7 × 3 × height of prism B

105 = 21 × height of prism B

height of prism B = 105/21

height of prism B = 5

Therefore, the height of rectangular prism B is 5 yards.

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15(2x -10) + 4x= -3(15x + 4)

Answers

The value of x in the equation 15(2x - 10) + 4x = -3(15x + 4) is 1.7

What is an equation?

An equation is an expression that shows the relationship between numbers and variables using mathematical operators.

Given the equation:

15(2x - 10) + 4x = -3(15x + 4)

Solving the parenthesis:

30x - 150 + 4x = -45x - 12

Collect like terms:

30x + 4x + 45x = -12 + 150

79x = 138

Dividing both sides by 79:

x = 1.7

The value of x is 1.7

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Ali has X paintings He buys two more paintings.
How many Paintings does he now have?

Answers

Answer:

X+2

Hope this helps

WhaYou is 1/5 divided by 2/6

Answers

1/5 divided by 2/6= 3/5

Write an expression to represent: 6 times the difference of 5 and x

Answers

Answer:

6 * (5 - x)

Step-by-step explanation:

This expression calculates the difference between 5 and x, and then multiplies it by 6. The difference is obtained by subtracting x from 5, and then the entire result is multiplied by 6.

Other Questions
What is the meaning of the word "consumption" as it is used in the passage on page 3? 3) determine the equilibrium constant for the following reaction at 498 k. circle your answer. 2 hg(g) o2(g) 2 hgo(s) h = -304.2 kj; s = -414.2 j/k k=? A testcross was completed between a female wild type fruit fly with a male that has purple eyes, black body, and curved wings. The following results were produced: phenotype N wild type 5701 black, +, + 367 curved, purple, + 388 black, curved, purple 5617 purple, black, + 1383 purple, + 60 curved, black, + 72 curved, +, + 1,412 do funds that are likely to trade at substantial discounts from their net asset values include: exchange traded funds? closed-end funds? a no no b no yes c yes no Compare and contrast alfreds and cudreds trait action intraction include 2 details form drama in your answer using the proper calculator, find the approximate number of degrees in angle b if tan b = 1.732. Sam is flying a kite the length of the kite string is 80 and it makes an angle of 75 with the ground the height of the kite from the ground is McFann spent $1,750 on a marketing study to estimate the number of units that it can sell each year. What should McFann do to take this information into account?a. The company does not need to do anything with the cost of the marketing study because the marketing study is a sunk cost.b. Increase the NPV of the project $1,750.c. Increase the amount of the initial investment by $1,750. Chapter 1 Of Mice and Men- what is the one conflict for George and the two conflicts for Lennie?? a gantt chart is fully developed during the ________ phase of the project management process.executionclosureplanninginitiation TRUE OR FALSE the tasks in a wbs must be developed as a sequential list of steps. group of answer choices true false The IS-related job position that works with business leaders and planners to develop processes and systems that implement business Strategy and goal is that of..... A. database administrator. B. network administrator. C. technical writer nhusiness analyst what are the requirements/procedures (include jes) for month-end closing for fixed assets? (Please few accounts with credit and debit journal entries for each)[Show JEs to get full credit] All of the following would be considered activities of a hospital for activity based costing except a. admission. b. depreciation. c. dietary and laundry d. operating room. What connections can be made between the short clip from family ties and the video consumerism in the 1980s help please i dont understand this lol calculate the temperature (inc) at which pure water would boil at a pressure of 652.4 torr. hvap = 40.7 kj/mol enter to 1 decimal place. which characteristic of beowulf is revealed when he refuses to use weapons to fight the monster grendel? responses While looking at the petty dish , you discovered a cell under the microscope what kind of cell is it 1: WHAT ROLE DID SOUTH AFRICAN WOMEN PLAY AGAINST THE VIOLATION OF HUMAN RIGHTS FROM THE 1950s TO 1960s?