Let's assume that John buys x boxes of Cereal A and y boxes of Cereal B. Then, we can write the following system of inequalities based on the nutrient and calorie requirements:
10x + 5y ≥ 500 (minimum 500 units of vitamins)
5x + 10y ≥ 600 (minimum 600 units of minerals)
15x + 15y ≥ 1200 (minimum 1200 calories)
We want to minimize the cost, which is given by:
0.5x + 0.4y
This is a linear programming problem, which we can solve using a graphical method. First, we can rewrite the inequalities as equations:
10x + 5y = 500
5x + 10y = 600
15x + 15y = 1200
Then, we can plot these lines on a graph and shade the feasible region (i.e., the region that satisfies all three inequalities). The feasible region is the area below the lines and to the right of the y-axis.
Next, we can calculate the value of the cost function at each corner point of the feasible region:
Corner point A: (20, 40) -> Cost = 20
Corner point B: (40, 25) -> Cost = 25
Corner point C: (60, 0) -> Cost = 30
Therefore, the minimum cost is $20, which occurs when John buys 20 boxes of Cereal A and 40 boxes of Cereal B.
Use what you know about scientific notation to write the number - 8,000 with a power of 10.
- 8,000
- 8,000 = 0
Therefore , the solution to the given problem of expression comes out to be -8 * 10³.
How do you determine an expression?A number must be substituted for each variable and arithmetic operations must be carried out in order to verify an algebraic expression. The response variable is equivalent to 6 in the illustration above because 6 + 6 equals 12. The variables can be replaced with their values if we know what they are, and the expression can then be evaluated.
Here,
Given : - 8,000
To write -8000 with a power of 10
Thus,
-8000 written into
=> -8 * 10³
So, we get -8 * 10³ as the scientific notation for the given expression
Therefore , the solution to the given problem of expression comes out to be -8 * 10³.
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Write an equivalent expression by distributing the "sign outside the parentheses:
4w (5.8x - 3.3)
Answer:
23.2wx - 13.2w
Step-by-step explanation:
4w (5.8x - 3.3) =
4w * 5.8x - 4w * 3.3 = distribute 4w to 5.8x and 3.3
4 * 5.8 *w * x - 4w * 3.3 =
23.2 * w * x - 13.2w ==> simplify
23.2wx - 13.2w
There are 18 streetlights evenly spaced on a 1.5-mile road. How many streetlights would you expect on a 4-mile road in which are spaced out the same?
If the streetlights are spaced in the same way, there will be 48 streetlights on the 4-mile road.
How many streetlights would you expect on a 4-mile road?First, we know that there are 18 streetlights evenly spaced on a 1.5 mile road.
Then the space between consecutive streetlights is:
1.5mi/18 = (3/36) mi = (1/12) mi
Now, the number of streetlights that we will have on a 4-mile road is given by the quotient between the length of the road and the distance between consecutive streetlights, it is:
N = 4mi/(1/12 mi) = 12*4 = 48
There will be 48 streetlights on a 4 mile road.
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Find the domain and the range of the function. (Enter your answers using interval notation.)
h(x) = −√x+6
The domain and the range of this function in interval notation include the following;
Domain = [-6, ∞].
Range = [-∞, 0].
How to identify the domain and range of a function?In Mathematics, the horizontal extent of a graph represents all domain values and they are read and written from smaller to larger numerical values, and from the left of a graph to the right.
Furthermore, the vertical extent of a graph represents all range values and they are always read and written from smaller to larger numerical values, and from the bottom of the graph to the top.
By critically observing the graph shown in the image attached below, we can reasonably and logically deduce the following:
Domain = -6 < x < ∞ or [-6, ∞].
Range = -∞ < y < 0 or [-∞, 0].
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Nick has $20. He wants to buy as
many toy cars as he can. Each car
costs $3. How many toy cars can
Nick buy?
Answer:
6
Step-by-step explanation:
20 divided by 3 without any remainders, fractions, or decimals is 6.
Hope I helped!
how to solve 3(x-12)=15
Answer:
Below
Step-by-step explanation:
3 (x-12) = 15 divide both sides of the equation b y 3 to get :
x-12 = 5 now add 12 to both sides
x = 17 Done.
[tex]\huge\text{Hey there!}[/tex]
[tex]\huge\textbf{Solving for x or simplify this equation}[/tex]
[tex]\mathsf{3(x - 12) = 15}[/tex]
[tex]\huge\textbf{DISTRIBUTE 3 within PARENTHESES}[/tex]
[tex]\mathsf{3(x) + 3(-12) = 15}[/tex]
[tex]\mathsf{3x - 36 = 15}[/tex]
[tex]\huge\textbf{ADD 36 to BOTH SIDES}[/tex]
[tex]\mathsf{3x - 36 + 36 = 15 + 36}[/tex]
[tex]\huge\textbf{SIMPLIFY IT}[/tex]
[tex]\mathsf{3x = 15 + 36}[/tex]
[tex]\mathsf{3x = 51}[/tex]
[tex]\huge\textbf{DIVIDE 3 to BOTH SIDES}[/tex]
[tex]\mathsf{\dfrac{3x}{3} = \dfrac{51}{3}}[/tex]
[tex]\huge\textbf{SIMPLIFY IT}[/tex]
[tex]\mathsf{x = \dfrac{51}{3}}[/tex]
[tex]\mathsf{x = 17}[/tex]
[tex]\huge\text{Therefore, your answer should be:}[/tex]
[tex]\huge\boxed{\mathsf{x = 17}}\huge\checkmark[/tex]
[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]
If there are 10 decimeters in a meter, explain why there are not 10 cubic decimeters in a cubic meter.
Choose the correct answer below.
OA. There are not 10 cubic decimeters in a cubic meter because a cubic meter is a meter squared. This means
that there are 10² cubic decimeters in a cubic meter.
OB. There are not 10 cubic decimeters in a cubic meter because a cubic meter is a meter cubed. This means
that there are 10 cubic decimeters in a cubic meter.
OC. There are not 10 cubic decimeters in a cubic meter because a cubic meter is a meter squared. This means
1
that there are cubic decimeters in a cubic meter.
10²
OD. There are not 10 cubic decimeters in a cubic meter because a cubic meter is a meter cubed. This means
that there are
1
cubic decimeters in a cubic meter.
10
Answer:
B. There are not 10 cubic decimeters in a cubic meter because a cubic meter is a meter cubed. This means that there are 10³ cubic decimeters in a cubic meter.
Step-by-step explanation:
When we cube a number, we multiply the number by itself twice.
Therefore a cubic meter is:
m × m × m = m³To calculate the number of cubic decimeters in a cubic meter, we need to cube the number of decimeters in a meter.
Given there are 10 decimeters in a meter, then there are 10³ cubic decimeters in a cubic meter:
10 × 10 × 10 = 10³HELPPPP
If a fair coin is tossed 9 times, what is the probability, rounded to the nearest
thousandth,
of getting at most 1 heads?
When a fair coin is tossed nine times, there is a 0.090 (rounded off to the nearest thousandth) chance that at most one will land on heads.
what is probability ?The probability that an event will occur or a claim will be true is measured by probability theory, a branch of mathematics. The probability of an occurrence is a number between 0 and 1, where about 0 represents how likely the event is to occur and 1 represents certainty. A probability is a numerical illustration of the possibility that a specific occurrence will take place. Probabilities can also be expressed as percentages ranging from 0% to 100% or from 0 to 1. the ratio of the total number of outcomes to the proportion of occurrences in a whole set of equally likely options that lead to a specific occurrence.
given
binomial probability ⁿCₓ[(p)ˣ(q)ⁿ⁻ˣ]
where p= probability of tail = 1/2 (favorable outcome)
q = probability of head = 1/2: (1 - p)
n = total outcome = 9
x = 4
ⁿCₓ[(p)ⁿ(q)ⁿ⁻ˣ] = ⁹C₄[(1/2)⁴(1/2)⁵]
= [1/16 x 1/32]
= (512)
126/512 = 0.24609
≈ 0.090 nearest thousandth rounded off .
When a fair coin is tossed nine times, there is a 0.090 (rounded off to the nearest thousandth) chance that at most one will land on heads.
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Calculate S3, S, and Ss and then find the sum for the telescoping series 3C0 n + 1 n+2 where Sk is the partial sum using the first k values of n. S3 = 1/6 S4 = __
S5 = __
S = __
The solutions are -
S3 = (1/3) - (1/4) + (1/4) - (1/5) + (1/5) - (1/6)
S4 = (1/3) - (1/4) + (1/4) - (1/5) + (1/5) - (1/6) + (1/6) - (1/7)
S5 = (1/3) - (1/4) + (1/4) - (1/5) + (1/5) - (1/6) + (1/6) - (1/7) + (1/7) - (1/8)
The sum of the series is 1/3.
To find S3, we need to find the sum of the first 3 terms of the series:
S3 = (1/3) - (1/4) + (1/4) - (1/5) + (1/5) - (1/6)
To find S4, we need to find the sum of the first 4 terms of the series:
S4 = (1/3) - (1/4) + (1/4) - (1/5) + (1/5) - (1/6) + (1/6) - (1/7)
To find S5, we need to find the sum of the first 5 terms of the series:
S5 = (1/3) - (1/4) + (1/4) - (1/5) + (1/5) - (1/6) + (1/6) - (1/7) + (1/7) - (1/8)
To find the sum of the telescoping series, we can use the property of the telescoping series where the terms will cancel out. In this case, we can see that the first term of each group of two terms cancels out with the second term of the next group of two terms.
S = (1/3) - (1/8)
The series starts at n=2 and ends at infinity, so the sum of the series is the difference between 1/3 and the limit of 1/n as n approaches infinity, which is zero.
S= (1/3) -0 = 1/3
So the sum of the series is 1/3.
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The complete question is -
Calculate S3, S4, and S5 and then find the sum for the telescoping series: S=∑n=2∞(1/n+1)−(1/n+2). where Sk is the partial sum using the first k values of n.
Point U is the midpoint of Find the value of x. Round to the nearest tenth if necessary.
Answer:
[tex]x=8.5[/tex]
Step-by-step explanation:
By the definition of a midpoint, [tex]TU=UV[/tex].
[tex]6=2x-11 \\ \\ 2x=17 \\ \\ x=8.5[/tex]
I NEED HELP PLEASE I WILL GIVE BRAINLYIES
Answer: b
Step-by-step explanation:
Let G(x) = -2(3x+4)(x-1)(x-3)^2 be a polynomial function. make a rough sketch of polynomial, label, and name all the x-intercepts and y-intercepts
The intercepts of the graph are
x-intercepts are -4/3, 1, 3y-intercept is 72How to determine the intercepts of the graphThe polynomial is given as
G(x) = -2(3x+4)(x-1)(x-3)^2
Rewrite as
G(x) = -2(3x+4)(x-1)(x-3)²
The x-intercepts of a polynomial are the points at which the polynomial crosses the x-axis.
To find the x-intercepts, we need to set y = 0 and solve for x.
-2(3x+4)(x-1)(x-3)² = 0
Divide through by -1
(3x+4)(x-1)(x-3)² = 0
Now we can solve for each factor equal to zero:
3x+4 = 0, x = -1.33
x-1 = 0, x = 1
x-3 = 0, x = 3
So the x-intercepts are -4/3, 1, 3
The y-intercept of a polynomial is the point at which the polynomial crosses the y-axis.
For this polynomial, we have
G(0) = -2(30+4)(0-1)(0-3)² = -2(4)(-1)(9) = 72
So the y-intercept is (0, 72)
See attachment for the graph
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find the exact value of cos -pi/3
The exact value of cos (-pi/3) can be found using the unit circle or the angle addition formula.
Using the unit circle, we know that the x-coordinate of the point on the unit circle that corresponds to an angle of -pi/3 is cos(-pi/3) and y-coordinate is sin(-pi/3).
On the unit circle, the angle of -pi/3 is the same as the angle of 2pi/3 (since the unit circle has a period of 2pi), therefore the x-coordinate of the point on the unit circle that corresponds to an angle of -pi/3 is -1/2.
Alternatively, using the angle addition formula:
cos (-pi/3) = cos(pi - pi/3) = cos(pi) * cos (pi/3) - sin(pi) * sin(pi/3) = -1/2
So, the exact value of cos (-pi/3) is -1/2.
The difference between eleven and the number d
An IV is infusing at 77 mcgtt/min. What would this rate of flow equal in mL/h?
A. 77 mL/h
B. 12 mL/h
C. 770 mL/h
D. 7.7 mL/h
An IV is infusing at 77mcgtt/min. rate of flow equal in mL/h is 77 mL/h
1gtt/min equals 3.00 mL/h
If you simply need to figure out the infusion rate, or the mL per hour to infuse, take the total volume in mL, divided by the total time in hours that the medication is ordered to be infused over, to equal the rate in mL per hour.
1 drop per minute to milliliters per hour = 3.00 mL/h
2 drops per minute to milliliters per hour = 6.00 mL/h
Change hours to minutes. Change milliliters to drops.
1 ml : 60mcgtt
1hr :60min
77mcgtt/min =77*60/60 ml/h
=77ml/h
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pls help with a easy problem miles and kilometers ansewer
Answer:
Step-by-step explanation:
Since 5 miles is approximately 8 kilometers, and Sawyer lives 12.7 kilometers from the soccer field, Sawyer lives farther than Jabar from the soccer field.
So Sawyer lives about 4.7 kilometers farther from the soccer fields.
A person invests 1000 dollars in a bank. The bank pays 5.75% interest compounded
monthly. To the nearest tenth of a year, how long must the person leave the money
in the bank until it reaches 2900 dollars?
The person must leave the money for 18.6 .
How long must the person leave the money ?The amount deposited in the bank,[tex]A= P (1 +\frac{r}{n} )^{nt}[/tex]
Here ,A =Amount = 2900
P = Principal = 1000
r = ratio = 5.75%
2900 = 1000[tex](1 +\frac{5.75}{12} )^{12x[/tex]
Converting decimals to integers,2900 = 1000 [tex](1 +\frac{575}{120000} )^{12x[/tex]
Reducing the fractions,2900 = 1000[tex](1 +\frac{23}{4800} )^{12x\\\\[/tex]
2900 = 1000[tex](1 +\frac{4823}{4800} )^{12x\\\\[/tex]
Dividing both sides of the equation by the coefficient of variable,2900/1000 = 1000[tex](\frac{4823}{4800} )^{12x\\\\[/tex]
29/ 10 = [tex](\frac{4823}{4800} )^{12x\\\\[/tex]
Converting exponential to logarithm form,12x = [tex]log _{\frac{4823}{4800} }\frac{29}{10}[/tex]
[tex]x = \frac{log _{\frac{4823}{4800} }\frac{29}{10}}{12}[/tex]
Rounding to the required place , x = 18.6What are fractions?An element of a whole is a fraction. The number is represented mathematically as a quotient, where the numerator and denominator are split. Both are integers in a simple fraction. A fraction appears in the numerator or denominator of a complex fraction.The numerator of a proper fraction is less than the denominator.A fraction is a number that is a component of a whole. By breaking a whole into a number of parts, it is evaluated. A number that represents a rational number is called a common fraction. A decimal, percent, or negative exponent can all be used to represent the same number.To learn more about fractions, refer :
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the dot plot below shows the sizes for five classes with a mean of 44 and standard deviation of 8. the dynamic equation shows the mathematical conversion to z-scores in real-time. drag the vertical line to see the corresponding z-score for each possible class size.
The Z-Score associated on moving one standard devations to the right is equals to the 1.0, i.e., Z = 1.00. So, correct answer is option (c).
We have, The number of classes, n = 5
Mean of size of five classes,µ = 44
Standard deviations for five classes,σ = 8
The dynamic equation for conversion to z-scores in real-time is, Z = (Xᵢ - µ )/standard deviations (s)
Z-Score : A Z-Score is a metric that represents that how closely a value relates to mean of set of values. If Z score value is zero that means data point's scores are same as mean score.
Formula for Z- Score is Z = (X - µ)/σ
where, X ---> data values
µ --> mean of values
σ --> standard deviation
For 32, Z = (X - µ)/σ = (32 - 44)/8 = -1.50
For 42 , Z= (X- µ)/σ = (42 - 44)/8 = -0.25
For 48, Z = ( 48 - 44)/8 = 0.5
For 52, Z = ( 52 - 44)/8 = 1.0
For 54, Z = (54 - 44)/8 = 1.25
When we move One standard deviations to right , that means X = 44 + 8 = 52 , So the Z-Score for 52 is Z = 1.0. Hence, required value is 1.0.
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Complete question:
The dot plot below shows the sizes for five classes with a mean of 44 and standard deviation of 8. The dynamic equation shows the mathematical conversion to z-scores in real-time. Drag the vertical line to see the corresponding z-score for each possible class size,
Z =( Xᵢ - X)/s Created by Gary M. McClelland, Professor Emeritus | University of Colorado Boulder Cengage Learning. All Rights Reserved. 1. Make sure the green line is on the mean value of x= 44. Next, move the green line one standard deviation to the right. What Z-score is associated with this value?
a. ) Z-0.75
b) Z= 0.80
c) Z = 1.00
d) Z = 0.5
Did I get this right? (pre calc)
The center of the ellipse is (2, -8), The endpoints of the major axis are 10 units from the center, The endpoints of the minor axis are 9 units from the center, To graph the ellipse, connects (2, 2), (11, -8), (2, -18) and (-7, -8) with smooth curve.
What is ellipse?An ellipse in mathematics is a plane curve that has two focal points and is such that the sum of the two distances from any point on the curve to the focal points is a constant. It generalizes a circle, a special kind of ellipse in which the two focal points coincide.
Glven:
The equation of ellipse is,
[tex]\frac{(x-2)^2}{81}+\frac{(x+8)^2}{100}=1[/tex]
SInce, the general form of ellipse is,
[tex]\frac{(x-h)^2}{a^2}+\frac{(y-k)^2}{b^2}=1[/tex]
where,
(h, k) is the center of ellipse
a is the minor axis
b is the major axis.
Here
(h, k) = (2, -8) is the center of the ellipse.
9 is the minor axis and 10 is the major axis of the ellipse.
Also the graph of ellipse connects (2, 2), (11, -8), (2, -18) and (-7, -8) with smooth curve.
Hence, the center of the ellipse is (2, -8).
The endpoints of the major axis are 10 units from the center.
The endpoints of the minor axis are 9 units from the center.
To graph the ellipse, connects (2, 2), (11, -8), (2, -18) and (-7, -8) with smooth curve.
The graph of the ellipse visit.
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This table shows the amount of commission
earned for a broker receiving 3% commission
on sales. How much would this agent earn in
commission for $680,000 in sales?
Commission Earned
Sales (in thousands of $)
Commission (in thousands of $)
140
4.2
280
8.4
420
12.6
560 680
16.8
?
Answer:
$20,400
Step-by-step explanation:
You just have to multiply 680,000 by 0.03 (since 3% is equivalent to 0.03)
Help would be appreciated
The value of [tex]3\frac{3}{5}[/tex] ×[tex](-8\frac{1}{3})[/tex] is after simplification is C)-30
What is mixed fraction?
A mixed number combines an integer (whole number) with a fraction. It is also sometimes referred to as a mixed fraction (part of a whole number). When a number contains both an integer (whole number) and a correct fraction, it is known as a mixed number or mixed fraction (a fraction whose numerator is less than its denominator).
Here the given expression is ,
=> [tex]3\frac{3}{5}[/tex] ×[tex](-8\frac{1}{3})[/tex]
Now we need to convert them into improper fraction then,
=> [tex]\frac{15+3}{5}[/tex] × [tex]\frac{-(24+1)}{3}[/tex]
=> [tex]\frac{18}{5}[/tex] × [tex]\frac{-25}{3}[/tex]
=> 6 × -5 = -30
Hence the correct option is C)-30.
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There are 140 students in the seventh grade, and 5% are in the Environmental Club.
How many students are in the Environmental Club?
Answer:
7 students.
Step-by-step explanation:
A trick for this is to find 10% of the students in the Environmental Club and then divide by 2.
10% of 140 is simple; just remove the 0 and you got 14.
Next, divide 14/2 to get 5%
14/2 = 7
7 students are apart of the Environmental Club
Which table has a constant of proportionality between yyy and xxx of 0.90.90, point, 9? Choose 1 answer: Choose 1 answer: (Choice A) A xxx yyy 101010 999 181818 171717 292929 282828 (Choice B) B xxx yyy 444 3.63.63, point, 6 666 5.45.45, point, 4 121212 10.810.810, point, 8 (Choice C) C xxx yyy 333 3.33.33, point, 3 999 9.99.99, point, 9 111111 12.112.112, point, 1Which table has a constant of proportionality between yyy and xxx of 0.90.90, point, 9? Choose 1 answer: Choose 1 answer: (Choice A) A xxx yyy 101010 999 181818 171717 292929 282828 (Choice B) B xxx yyy 444 3.63.63, point, 6 666 5.45.45, point, 4 121212 10.810.810, point, 8 (Choice C) C xxx yyy 333 3.33.33, point, 3 999 9.99.99, point, 9 111111 12.112.112, point, 1Which table has a constant of proportionality between yyy and xxx of 0.90.90, point, 9? Choose 1 answer: Choose 1 answer: (Choice A) A xxx yyy 101010 999 181818 171717 292929 282828 (Choice B) B xxx yyy 444 3.63.63, point, 6 666 5.45.45, point, 4 121212 10.810.810, point, 8 (Choice C) C xxx yyy 333 3.33.33, point, 3 999 9.99.99, point, 9 111111 12.112.112, point, 1
A table which has a constant of proportionality between y and x of 0.9 include the following: B. table B.
How to determine with a constant of proportionality of 0.9?In order to have a proportional relationship and equivalent ratios that is constant, the variables x and y must have the same constant of proportionality.
Next, we would determine the constant of proportionality (k) based on the given parameters in each table:
Constant of proportionality (k) = y/x
Constant of proportionality (k) = 17/18
Constant of proportionality (k) = 0.94 (False).
For the variables x and y in table B, the constant of proportionality (k) is given by;
Constant of proportionality (k) = y/x
Constant of proportionality (k) = 3.6/4 = 5.4/6 = 10.8/12
Constant of proportionality (k) = 0.9 (True).
For the variables x and y in table C, the constant of proportionality (k) is given by;
Constant of proportionality (k) = y/x
Constant of proportionality (k) = 3.3/3
Constant of proportionality (k) = 1.1 (False).
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A data set consisting of newborn baby weights is normally distributed (bell-shaped) with a mean of 9.5 pounds
and standard deviation of 1.5 pounds.
Use the Empirical Rule to address the following questions.
Hint: sketch the distribution to help visualize the problem.
Approximately 99.7% of the newborn weights lie between
What approximate percentage of the newborn weights lie between 8 and 11 pounds?
and
What approximate percentage of the newborn weights lie between 6.5 and 12.5 pounds?
These approximate percentages are defined by the Empirical Rule, for a normally distributed variable:
68% of the measures within one standard deviation of the mean.95% of the measures within two standard deviation of the mean.99.7% of the measures within three standard deviation of the mean.More can be learned about the Empirical Rule at brainly.com/question/10093236
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please help me!!! What is the area of the trapezoid?
The area of trapezoid is 16 m².
Given in the figure,
Height of trapezoid = 4 m
Length of 1st parallel base = 2 m
Length of 2nd parallel base = 6 m
We know that,
Area of trapezoid = 1/2 * sum of bases * height
∴
Area of trapezoid = 1/2 * (2+6) * 4
= 8 * 2 = 16 m²
Therefore, the area of trapezoid is 16 m².
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the table and the scatter plot the total earning y(in dollars) of a food server who works x hours
Answer is B
y=16.9x+0.7
To Calculate line of best fit you can simply input the values into the stats function on your calculator and using the "Reg" function to get your values of the standard equation form of your line of best fit which is y=bx+a
b=16.9
a=0.7
What are the solutions of x² - 5x+7=0?
Answer:
x = 5/2 + (i sqrt(3))/2 or x = 5/2 - (i sqrt(3))/2
Step-by-step explanation:
Solve for x:
x^2 - 5 x + 7 = 0
Subtract 7 from both sides:
x^2 - 5 x = -7
Add 25/4 to both sides:
x^2 - 5 x + 25/4 = -3/4
Write the left hand side as a square:
(x - 5/2)^2 = -3/4
Take the square root of both sides:
x - 5/2 = (i sqrt(3))/2 or x - 5/2 = -(i sqrt(3))/2
Add 5/2 to both sides:
x = 5/2 + (i sqrt(3))/2 or x - 5/2 = -(i sqrt(3))/2
Add 5/2 to both sides:
Answer: x = 5/2 + (i sqrt(3))/2 or x = 5/2 - (i sqrt(3))/2
which value of w makes the equation true
2w+4=28
Answer:
12
Step-by-step explanation:
2w + 4 = 28
2w = 24
w = 12
w = 12.
Step-by-step explanation:1. Write the expression.[tex]2w+4=28[/tex]
2. Subtract 4 from both sides of the equation.[tex]2w+4-4=28-4\\ \\2w=24[/tex]
3. Divide by 2 in both sides of the equation.[tex]\frac{2w}{2} =\frac{24}{2} \\ \\w=12[/tex]
4. Verify your answer.To verify the answer, write the original expresion and substitute variable "w" by the calculated value (12). If the calculations equal the same number of both sides of the equal sign (=) then the answer is correct.
[tex]2(12)+4=28\\ \\24+4=28\\ \\28=28[/tex]
The same number appears on both sides of the equal sign. Hence, the answer is correct!
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vector <1,2,x> has magnitude of 3. find the value of x if x is a negative number
Answer:
x = - 2
Step-by-step explanation:
the magnitude of a vector < a, b, c > is
[tex]\sqrt{a^2+b^2+c^2}[/tex]
given vector < 1, 2, x > has magnitude of 3 , then
[tex]\sqrt{1^2+2^2+x^2}[/tex] = 3
[tex]\sqrt{1+4+x^2}[/tex] = 3
[tex]\sqrt{5+x^2}[/tex] = 3 ( square both sides to clear the radical )
5 + x² = 3² = 9 ( subtract 5 from both sides )
x² = 4 ( take square root of both sides )
x = ± [tex]\sqrt{4}[/tex] = ± 2
since x is negative then x = - 2
what is the inverse f(x)=3x^3-4
Answer:
f^-1(x) = [tex]\sqrt[3]{(x + 4)/3}[/tex]
Step-by-step explanation:
y = 3x^3 - 4 ==> solve for x
y + 4 = 3x^3 ==> isolate x by adding 4 on both sides
(y + 4)/3 = x^3 ==> divide 3 into both sides
x = [tex]\sqrt[3]{(y + 4)/3}[/tex] ==> isolate x by taking the cube root on both sides
y = [tex]\sqrt[3]{(x + 4)/3}[/tex] ==> switch both x and y
f^-1(x) = [tex]\sqrt[3]{(x + 4)/3}[/tex]