For which interval is the function constant?
(-infinity, 0)
(6, infinity)
(2, 6)
(0, 2)
Answer:
the answer is (2,6)
Step-by-step explanation:
−5(x−10)=−50 i need help answering it
[tex] - 5(x - 10) = - 50[/tex]
[tex] - 5x + 50 = - 50[/tex]
[tex] - 5x = - 50 - 50[/tex]
[tex] - 5x = - 100[/tex]
[tex] \frac{ - 5x}{ - 5} = \frac{ - 100}{ - 5} [/tex]
[tex]x = 20[/tex]
The half-life of a radioactive substance is the time it takes for half of the substance to decay. The half-life of one form of rhodium, Rh-106, is about 30 seconds. If you start with 100 grams of Rh-106, how much will be left after 4 minutes?
Answer:
0.390625 grams
Step-by-step explanation:
can i get a second opinion on this
Joe's fitness club charges $40 a month for a membership. Mike's fitness club charges $20 for a membership per month and a $100 starting fee. After how many months will the total amount paid to the two clubs be the same?
Answer:
5 months
Step-by-step explanation:
Create an Equation:
m=months
Joe- 40m
Mike- 20m +100
Make each equation equivalent:
40m=20m+100
Solve:
40m-20m=100
20m=100
m=5
If you plug it back in, the equation is satisfied:
40(5)=20(5)+100
200=100+100
200=200
I need this for my homework!: Describe the steps you can use to find an average of
fractional amounts.
Thanks! ＜；
Step-by-step explanation:
for example 1)8,9,12,8,7,11,3,9,5
we need to find average
first add all the numbers =72
we divide by how many number we havein data base which is 9 (mean count how many numbers we have)
72/9=8
Two owners of a cattle ranch, Jo and Val, want to find the average weight for the ranch's 200 cows. Instead of weighing all of the cows: Jo weighs 25 cows and gets an average weight of 1,350 pounds (stdev 50) Val weighs 100 cows and gets an average weight of 1,420 pounds (stdev 50) What is Jo's margin of error, rounded to the nearest whole number? (The formula is 1.96 straight x left parenthesis StdDev right parenthesis divided by square root of straight N)
Answer:
The answer is "20".
Step-by-step explanation:
Given value:
[tex]\to Z_{critical}= 1.96\\\\\to {StdDev} = standard\ deviation = 50 \\\\\to n= 25\\\\[/tex]
formula:
[tex]\bold{Margin error}= Z_{critical} \times \frac{\text{StdDev}}{\sqrt{n}}\\[/tex]
[tex]= 1.96 \times \frac{ 50 }{\sqrt{25}}\\\\= 1.96 \times \frac{ 50 }{\sqrt{5 \times 5}}\\\\= 1.96 \times \frac{ 50 }{{5}}\\\\= 1.96 \times 10 \\\\= 19.6 \\\\= 20[/tex]
Claire has a hot tub with a diameter of 7 feet. She wants to purchase a cover to protect the hot tub. What is the area of the cover? Use Pi = 3. 14 and round the answer to the nearest square foot.
Answer:
38 square feet
Step-by-step explanation:
How do we find the area of a circle?
❖ The area of a circle is πr², where r = radius. For this case, we're going
to approximate pi as 3.14.
How do we find the radius given diameter?
❖ We are given the diameter of Claire's hot tub as 7 feet. The diameter
is 2x the radius, so we divide 7 by 2 to get the radius, which is 3.5
feet.
Solving
[tex]3.14*3.5^2[/tex] [tex]3.14 *12.25[/tex] [tex]38.465[/tex] 38.465 ≈ 38Therefore, the answer is 38 square feet. Have a lovely rest of your day/night, and good luck with your assignments! ♡
PLS HELP GIVING BRAINLIEST TO FIRST PERSON
Answer:
Solve for x
by simplifying both sides of the equation, then isolating the variable. x=ordw
Step-by-step explanation:
or it could be word
Answer:
x=57
Step-by-step explanation:
I think i already answered this question, but i will rewrite it again! since the angles 'x' and '2x+9' add up to become a supplement angle or a straight line.
We can establish the relation which says that the sum of these two angles is equal to 180.
[tex]x + 2x + 9 = 180[/tex]
[tex]3x + 9 = 180[/tex]
[tex]3x = 180 - 9[/tex]
[tex]3x = 171[/tex]
[tex]x = \frac{171}{3} = 57[/tex]
What is the solution to the equation?
A. x = 144
B. x = 30
C. x = 18
D. x = 4
Answer:
D
Step-by-step explanation:
1/24x = 1/6
Multiply 1/6 by the reciprocal of 1/24 which is 24/1
Therefore;
X = 1/6 × 24/1
X = 4
A clay model of a new car is 7 in. Long. The actual car is 21 ft long. Part 1: What proportion can you use to find the scale used to make the model? Part 2: What is the scale of the model? Select BOTH answers. * 2 points Option 1 1 in. : 3 ft. 1 in. : 1 ft. Option 3 Option 2 3 in. : 1 ft.
Answer:
3ft:1in
Step-by-step explanation:
Given the clay model of a new car = 7in
If the actual car is 21ft, first we will have to convert 21ft to inches
Ift = 12in
21ft = x
x = 21×12.
x = 252in
21ft = 252in
This means that the clay model (7in) has to be scaled up to 252in. This is known as enlargement.
To know the scale of the model, we will take the ratio of the actual car to the clay as shown
Scale = actual car model/clay car model
Scale = 252/7
Scale = 36/1
We can also use the exact units of both measurement used in question
Scale = 21ft/7in
Scale = 3ft/1in
Hence the scale of the model is 3ft:1in
The area of a triangle 36 ×39×15
Answer:
a=21060[tex]in^{3}[/tex]
Step-by-step explanation:
A= B*W*H
A=36*39*15
A=1404*15
A=21060
PLEASE HELP 30 POINTS
Line A is represented by the equation, y=1/4x +5
(a) Write in slope-intercept form the equation of a line that is parallel to Line A and passes through the point, (8, -2). Show your work
(b) Write in slope-intercept form the equation of a line that is perpendicular to Line A and passes through the point, (4,1). Show your work.
Answer:
(a) y = 1/4x - 4
(b) y = -4x + 17
Step-by-step explanation:
Slope-Intercept Form: y = mx + b
m - slope
b - y-intercept
(a)
Parallel lines have the same slope but different y-intercepts.
m = 1/4x
y = 1/4x + b
-2 = 1/4(8) + b
-2 = 2 + b
b = -4
y = 1/4x - 4
(b)
Perpendicular lines have the negative reciprocal slope.
m = -4
y = -4x + b
1 = -4(4) + b
1 = -16 + b
b = 17
y = -4x + 17
Answer:
(a) y = 1/4x - 4
(b) y = -4x + 17
Step-by-step explanation:
Slope-Intercept Form: y = mx + b
m - slope
b - y-intercept
Parallel lines have the same slope but different y-intercepts
Perpendicular lines have the negative reciprocal slope.
James has 858 feet of rope. There are 18 teams of hikers.
If James gives an equal amount of rope to each team, how much rope will each team receive?
Each team will receive
feet of rope.
Also simplify.
Which is the best description of the equivalency of the two expressions?
Expression 1
5x2 - 2x-4+6x+3
Expression 2
6x2 - 6x+6-x^2+10x-7
The two expressions are not equivalent because when x=2, the two expressions do not have the same value
O The two expressions are not equivalent because when they are simplified, they do not have the same coefficients
for the x2 and x terms.
O They are equivalent because the sum of the constants is the same in both expressions.
O They are equivalent because when x = 2, the two expressions have the same value.
PLEASE HELP IM ON A TIMER I WILL GIVE BRAINLIEST
Answer: D
Step-by-step explanation:
Equivalent when u use x=2
3x + 5x - 2 + 18x = 180
Answer:
x=7
Step-by-step explanation:
3x+5x-2+18=180
26x-2=180
26x=182
x=7
Write in the given rational numbers into the correct order line from least to gratest
-2/3, 7/8, -4/5 7/10, and -4/3
Pls hurry yall
Answer:
-4/3, -4/5, -2/3, 7/10, 7/8
Use the algebra tiles to model x 1. Then choose the answer that describes the correct tiles. One blue x tile and one orange tile one orange x tile and one blue – tile one blue x tile and one blue – tile one orange x tile and one orange tile.
The correct statement which describe about the algerbric tile one orange x tile and one orange + tile.
What are algerbra tiles?
Algebra tiles are square and rectangle shaped tiles or tiles that represent numbers and variables.
Given
Use the algebra tiles to model x + 1.
Algebra tiles are square and rectangle-shaped tiles that represent numbers and variables.
Using algebra tiles provides a more visual way for us to solve our problems.
The correct statement which describe about the algerbric tile one orange x tile and one orange + tile.
Hence, the correct statement which describe about the algerbric tile one orange x tile and one orange + tile.
To know more about algerbra tiles click the link given below.
brainly.com/question/81876
The area of a right triangle is 336 square inches. The height of the right triangle is 48 inches. What is the length of the hypotenuse of the right triangle?
Part 2:
2.4.3: Denver to Chicago
A plane flew at a constant speed between Denver and Chicago. It took the plane 1.5 hours to fly 915 miles.
Answer:
Whats the question?
Step-by-step explanation:
a large container contains 5 gallons of water. it begins leaking at a constant rate. After 20 mins, the container has 1 gallon of water left. At what rate is the water leaking?
Answer:
12 gallons/hour or 1 gallon/5 minutes (1/12 gallon)
Step-by-step explanation:
assuming gravity can capilary action can be ignored amd has nothing to do with it, 20 minutes is 4 gallons of water gone, so 5 minutes for 1 gallon of water gone. 60 minutes in an hour, so 12 gallons per 60 minutes
8 + 6.9x what is the value of x
8 + 6.9x = 0
(Setting equation to 0 to figure out what x could be)
6.9x = -8
(Subtract 8 to both sides to isolate the x)
X = -8/6.9 or -1.15942
(Divide 6.9 to isolate x and you get your answer)
Is the figure shown in the xy-coordinate plane a parallelogram? Why or why not? Use the given coordinates to justify your answer.
The figure shown would represent a parallelogram if opposite sides are parallel and congruent
It is true that the figure is a parallelogram
How to determine if the figure is a parallelogram
The coordinates of the figure are given as:
O = (0,0)
P = (a,b)
S = (a + c,b)
T = (c,0)
Vertices O and T are on the same horizontal level, because they have the same y-coordinate
The above is also applicable to vertices P and S
By observation, we have the following distances:
PS = c
OT = c
This means that the opposite sides are parallel and congruent
Hence, the figure is a parallelogram
Read more about parallelograms at:
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Which derivation correctly uses the cosine sum identity to prove the cosine double angle identity
Answer: A
Step-by-step explanation: took the test
The derivation that correctly uses the cosine sum identity to prove the cosine double angle identity is A; cos²(x) - sin(x)²
What are trigonometric identities?Trigonometric identities are the functions that include trigonometric functions such as sine, cosine, tangents, secant, and, cot.
Let revise the identities of double an angle
sin(2x) = 2 sin(x) cos(x)
cos(2x) = cos²(x) - sin²(x)
cos(2x) = 2 cos²(x) - 1
cos(2x) = 1 - 2 sin²(x)
The equation
∵ cos(2x) = cos(x + x)
cos(x)cos(x) - sin(x)sin(x)
cos²(x) - sin(x)²
The identity is cosine double angle identity for cosine difference
Learn more about trigonometric;
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#SPJ2
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Answer:
See below.
Step-by-step explanation:
3 and 8 are like termsIn 9a, 9 is a coefficientFind the measure of x. PLEASE HELP ASAP. WILL MARK BRAINLIEST
Answer:
3.2 units to nearest tenth.
Step-by-step explanation:
cos 29 = x /3.7 (cosine = adjacent side / hypotenuse)
x = 3.7 * cos 29
= 3.236
The population of grizzly bears in a remote area is modeled by the function P(t) = (200t - 120)/(t + 0. 5) where t = 1 1represents the year 2001 t = 2 represents the year 2002and so onthe model to predict the number of grizzly bears born in the year 2018. (Use the table from
[tex]P(t)=\cfrac{200t-120}{t+0.5}\qquad \qquad \stackrel{\textit{t=18 for 2018~\hfill }}{P(18)=\cfrac{200(18)-120}{(18)+0.5}}\implies P(18)\approx 188[/tex]
the ratio at which x axis divides the point (2, - 8) and (-3, 6).
Pls tell me the answer as fast as possible...
We are having math surprise test today...
Answer:
The answer is Math. M a t h
Step-by-step explanation:
Good luck!
Graham uses a 10 by 10 grid to model a decreasing pattern. He cuts off a section representing a percent of the current area so that the remaining area represents the next term in the pattern, rounded to nearest whole centimeter. The area after each cut is shown on the graph. A graph shows number of cuts labeled 1 to 10 on the horizontal axis and remaining area (square centimeters) on the vertical axis. A line decreases from 0 to 10. After each cut, what percentage of the previous area is the the remaining area? 10% 20% 80% 100%.
After each cut, by observing the graph, the remaining area is 80% of the previous area.
It is given that
Actual area = 100cm²
What is the percentage?The percentage is the value per hundred.
According to the graph,
Area after the first cut =80cm² (80% of the previous are)
Area after the second cut = 64 cm²(80% of 80)
Area after third cut = 51.2 cm²(80% of 64)
So we can observe that area after each cut is 80% of the previous area.
Therefore, after each cut, the remaining area is 80% of the previous area.
to get more about percentage visit:
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After each cut, by observing the graph, the remaining area is 80% of the previous area.
It is given that
Actual area = 100cm²
What is the percentage?
The percentage is the value per hundred.
According to the graph,
Area after the first cut =80cm² (80% of the previous are)
Area after the second cut = 64 cm²(80% of 80)
Area after third cut = 51.2 cm²(80% of 64)
So we can observe that area after each cut is 80% of the previous area.
Therefore, after each cut, the remaining area is 80% of the previous area.
to get more about percentage visit:
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The buyer for a chain of stores purchased leather couches in bulk, paying $750 each. The stores will sell each leather couch for $1,275. What is the mark-up percentage?
Answer:
The mark-up percentage is 70%
Step-by-step explanation:
Let us revise the rule of the mark-up percentage
[tex]M=\frac{S-P}{P}[/tex] × 100%, where
M is the mark-up percentageS is the selling priceP is the purchasing pricelet us use this rule to solve the question
∵ The buyer purchased leather couches in bulk, paying $750 each
∴ P = 750
∵ The stores will sell each leather couch for $1,275
∴ S = 1,275
→ Substitute them in the rule above
∴ [tex]M=\frac{1275-750}{750}[/tex] × 100%
∴ [tex]M=\frac{525}{750}[/tex] × 100%
∴ M = 70%
∴ The mark-up percentage is 70%
Find the distance FG between the points F(6,7) and G(8,9)
Answer:
2.828
Step-by-step explanation: