Solve 7k ÷ 3 = 21.
The solution is k=?

Answers

Answer 1

Answer:

k=9

..............................


Related Questions

In ΔEFG, the measure of ∠G=90°, FG = 15 feet, and GE = 87 feet. Find the measure of ∠F to the nearest degree

Answers

Answer:

80

Step-by-step explanation:

delta math

Please help me I love u

Answers

Step-by-step explanation:

for a

x = 11

for b

x = - 3

for c

2 + x = - 5

for d

2x - 1 = 7

Hope it will help :)❤

Step-by-step explanation:

for a

x=-33/3=-11

for b

x=12/-4=-3

for c

2+x=-25/5

2+x=-5

for d

2x-1=-42/-6

2x-1=7

Select the correct answer.
Which function is the inverse of f(x) = -x^3 - 9?

Answers

Answer:

(2)

Step-by-step explanation:

Let f(x) = y → f-¹(x) = f(y) = x, f(y) is the inverse of f(x)

Thus,

=> -x³ - 9 = y

=> - y - 9 = x³

=> (-y - 9)^(1/3) = x

=> f(y) = x

Inverse is (-y-9)^(1/3)

Replacing the variable, inverse is (-x-9)^(1/3)

Option (2)

Math help!

Please only answer if you know the answer, the comment section is right below. Please don't waste my points!

Also, please show all of your work, you are trying to help me better understand the concept, not just give me the answer.

The image is down below. Show work! Thanks!

Answers

Answer: 1675 Ft. = Distance from

fire to the windmill.

Step-by-step explanation:

tan8 = 140/X1.

X1 = 140/tan8 = 996.2 Ft.

tan3 = 140/(996+X2)

996+X2 = 140/tan3 = 2671

X2 = 2671-996 = 1675 Ft. = Distance from

fire to windmill.

I am confused I got 9.7 but I am not sure? Any help out there.

Answers

Answer:

Im not sure If your suppose to calculate the whole area but for FGH Its 9

Step-by-step explanation:

HELP PLEASE DO NOT PUT A LINK

Answers

Answer:

No

No

Yes

Yes

No

Step-by-step explanation:

round your answer to two decimal places. x + 1/x+3=3/5

Answers

Answer:

X=2

Step-by-step explanation:

Please mark answer as brainliest

Use the Distributive Property to solve the equation.
- 3(x + 2) = 18


If you solve you get 50 points so pls help and no links pls

Answers

Answer:

x = -8

Step-by-step explanation:

-3x -6 = 18

-3x = 24

x = -8

1+1a+1-1=1 plssssssssssss telllllllll meeeeeee​

Answers

Answer:

a=0

Step-by-step explanation:

first, find the coefficient of 1 (doenst  have to be written)

1+a+1-1=1

remove the opposites

1+a=1

cancel equal terms

a=0

HELP PLS!! according to the rational root theorem, -2/5 is a potential rational root of which function?

Answers

Answer:

hi

Step-by-step explanation:

According to the Rational Roots Theorem, the possible rational roots are all the factors of the constant term expressed over the factors of the leading coefficient of the polynomial function. The reason is that the numerator of this rational root is a factor of 4 and the denominator is a factor of 25.

DOES IT HELP?!

Answer: D

Step-by-step explanation: Got it right

need help geometry question central angles and arcs !!! PLS HELP

Answers

Answer:

150°

Step-by-step explanation:

35 + 120 + 55 = 210

360 - 210 = 150

18 A bank charges a $ 10 fee to open an
account. Which of the following equations
best represents the total amount in the
account, m, when starting with d, dollars?
A. m = d + 10
B. m = d - 10
C. m - 10 = d
D. m + d = 10

Answers

The answer is A
Hope this helps :)
the answer is D! hope it helped

In 2005, there were 560 students in the eighth grade class at Maddison Middle School. In 2006, there were 590 students and in 2007 there were 616 students. What is the percent of increase from 2005 to 2007?

Answers

Answer:

5.357142857

Step-by-step explanation:

You invest $2,000 in an investment that pays an annual interest rate of 7.5% with monthly compounding. How many months will it take for your investment to be worth $3,500

Answers

Answer:

10 years

step-by-step explanation:

First, divide 7.5 by 100, you should get 0.075, then multiply 0.075 by 2000, you should get 150, thats  how much interest he gains each year, now subtract 2000 from 3500 to see how much he needs to get to 3500, you should get 1500, now divide 1500 by 150, you should get 10, which is how many years he will need to get to 3500 from 2000  

I want a expert or someone that can tell me this %100 I’m offering a brainalist + 20 points

Answers

Answer:

The answer is A

Step-by-step explanation:

Supplementary angles are angles which add up to 180°

∠1 and ∠3 add up to 180°, so they are supplementary.

The answer is A. Supplementary angles add up to 180 and are a straight line

In the linear equation y = 4x + 2, the value 2 represents which of the following?

A:The slope of the line

B: The y- coordinate of the y-intercept

C: The x-coordinate of the y-intercept

D: The quadrant in which the line lies

Answers

The answer is B: the y-coordinate of the y int.

Find the Surface Area. I need the answer fast.

Answers

Answer:

1615

Step-by-step explanation:

Area of triangle is: A= B•H•1/2

Area of square is A= L•W

39•17•1/2= 331.5

331.5•4= 1326

17•17= 289

Add the square area to the area of the triangles

289+ 1326= 1615

hope this helps chu <3

Answer:

663

Step-by-step explanation:

Since we are finding the area we multiply Length times Width which is a way of finding formal. L x W so the Length is 17 and Width is 39 so

17 x 39 = 663. So the area is 663

Determine whether the situation calls for a survey, an observational study, or an experiment. You want to find out if a new drug can help decrease the symptoms of migraine headaches.
experiment
observational study
survey
observational study is the wrong answer

Answers

Answer:

Experiment.

Step-by-step explanation:

It helps you determine the effect of the medication in a controlled environment with variables and controls.

Scores of an IQ test have a​ bell-shaped distribution with a mean of and a standard deviation of . Use the empirical rule to determine the following. ​(a) What percentage of people has an IQ score between and ​? ​(b) What percentage of people has an IQ score less than or greater than ​? ​(c) What percentage of people has an IQ score greater than ​?

Answers

Complete question is;

Scores of an IQ test have a​ bell-shaped distribution with a mean of 100 and a standard deviation of 13. Use the empirical rule to determine the following.

​(a) What percentage of people has an IQ score between 87 and 113​?

​(b) What percentage of people has an IQ score less than 74 or greater than 126​? ​

(c) What percentage of people has an IQ score greater than 139​?

Answer:

A) 68% of the people had an IQ score between 87 and 113

B) 5% of the people had IQ scores less than 74 and greater than 126.

C) 0.15% had an IQ score greater than 139

Step-by-step explanation:

We are given;

Mean; x¯ = 100

Standard deviation; σ = 13

According to the empirical rule in statistics;

>> 68% of the data lies within one standard deviation of the mean

>> 95% of the data lies within two standard deviations of the mean

>> 99.7% of the data lies within three standard deviations

A) We want to find the percentage of people with an IQ score between 87 and 113.

Within one standard deviation, we have;

x¯ ± σ

>> (100 - 13), (100 + 13)

>> (87, 113) which is the range we are looking for.

Thus, 68% of the people had an IQ score between 87 and 113

B) we want to find percentage of people has an IQ score less than 74 or greater than 126.

Let's first find those who had between 74 and 126.

Let's use two standard deviations within the mean.

x¯ ± 2σ

>> (100 - (2×13)), (100 + (2×13))

>> (74, 126) which is the range we are looking for.

So percentage that have IQ scores between 74 and 126 is 95%

Thus;

Percentage of those who had less than 74 and greater than 126 is;

P = 1 - 95%

P = 5%

C) we want to find the percentage of people that had an IQ score greater than 139.

Let's use the z-score formula;

z = (x¯ - μ)/σ

z = (139 - 100)/13

z = 39/13

z = 3

This means it is 3 standard deviations above the mean.

Thus;

Since it's one side outside the mean, then;

Percentage of people with an IQ score greater than 139 = (1 - 99.7%)/2 = 0.3%/2 = 0.15%

The confidence interval based on the two-sample design is wider because there is considerable variation in mileage between the cars. The confidence interval based on the paired design is wider because there is little variation in mileage between the cars. The confidence interval based on the two-sample design is wider because there is little variation in mileage between the cars. The confidence interval based on the paired design is wider because there is considerable variation in mileage between the cars.

Answers

Answer:

The confidence interval based on the paired design is wider because there is little variation in mileage between the cars.

Step-by-step explanation:

The sample size randomly collected is matched sample and since the confidence interval is based on the paired design is large and wide. There is small variation between the mileage of the two cars indicating the cars have mileage based on the fuel.

Expand (2+x)^3 using binomial theorem​

Answers

Step-by-step explanation:

= 2³ + x ³ + 3(2)²x + 3(2)x²

= 8 + x³ + 12x + 6x²

= x³ + 6 x² + 12 x + 8

Please help me.

1. Reflect triangle PQR over the y-axis. Then, describe what happened to each of the coordinates.

2. Reflect your new triangle P’Q’R over the x-axis. Describe what happened to each of the coordinates

Answers

Answer:

make dot in the 2,2 8,2 and 5,7 and join the dots

What value of a satisfies the following equation?

-2(a + 3) = -4a + 32

Answers

Answer:

a = 19

Step-by-step explanation:

-2(a + 3) = -4a + 32

-2a - 6 = -4a +32

+2a        +2a      

-6 = -2a + 32

-32         -32

-38 = -2a

divide by -2

a = 19

Answer:

a=19

Step-by-step explanation:

-2(a+3) = -4a + 32

-2a - 6 = -4a + 32(Group like terms)

-2a+4a=32+6

2a=38(Divide both sides by 2)

a=19

If an object is projected upward with an initial velocity of 125 ft per sec, its height h after t seconds is h= - 16t+ 125t. Find the height of the object after 2 seconds.​

Answers

Answer:

h(t) = -16t^2+125t

We need to find h(t) when t = 4 s:

h(4) = -16*4^2+125*4

h(4) = 244 ft

The height of the object after 4 seconds is 244 feet.

what is the value of x? ​

Answers

Step-by-step explanation:

Continuation of the answer

4x=180 degrees

X=180/4=45 degrees.

Which equation represents a circle that has a center at and a radius of 5?

Answers

what are the options?

you invested money in two funds. last year, the first fund paid a dividend of 9% and the second a dividend of 3%, and you receive a total of $921. This year, the first fund paid a 10% dividend and the second only 1%, and you received a total of $846. How much money did you invest in each fund?​

Answers

Answer:

x= $ 7100 investment in first fund

10x+y=84600 substitute the value of x

10*7100+y=84600

y=84600-71000

y= $ 13600 investment in second fund.

Step-by-step explanation:

jim began to bike a 173 mile bicycle trip to build up stamina for a for a triathlete competition.​ Unfortunately, his bicycle chain​ broke, so he finished the trip walking. The whole trip took 5 hours. If Jim walks at a rate of 4 miles per hour and rides at the rate of 38 miles per hour , find the amount of time he spent on the bicycle

Answers

Answer

3.5 hours

Step-by-step explanation:

Let us represent

The time spent walking as x

The time spent riding as y

Jim began a 146​-mile bicycle trip to build up stamina for a triathlete competition.​ Unfortunately, his bicycle chain​ broke, so he finished the trip walking. The whole trip took 5 hours.

Hence:

x + y = 5.... Equation 1

x = 5 - y

If Jim walks at a rate of 4 miles per hour and rides at 40 miles per​ hour,

The formula for Distance = Speed × time. Hence,

4 × x + 40 × y = 146 miles

4x + 40y = 146.... Equation 2

We substitute 5 - y for x in Equation 2

4(5 - y) + 40y = 146

20 - 4y + 40y = 146

Subtract 20 from both sides

20 - 20 - 4y + 40y = 146 - 20

- 4y + 40y = 146 - 20

36y = 126

y = 126/36

y = 3.5 hours

Since the time he spent raiding his bicycle is represented by "y", the amount of time he spent on the bicycle is 3.5 hours      

I think this is right I had this question I think it was the same one I dont know tho

HELP ME I BEED THIS DONE!

Answers

2 and 5 are the x intercepts the axis of symmetry is the highest point aka the top of the function and go straight down!

Semira’s puppy weighs 12.4 pounds and is growing at a rate of 0.8 pound per week. Cedric’s puppy weighs 9.2 pounds and is growing at a rate of 1.2 pounds per week. Let x represent the time in weeks and y represent the weight of the puppy in pounds. Which system of equations can Semira and Cedric use to determine after how many weeks their puppies will weigh the same?
{y=0.8x+12.4
{y=1.2x+9.2

{y=12.4x+0.8
{y=9.2x+1.2

{y=0.8x+1.2
{y=12.4x+9.2

{y=1.2x+0.8
{y=9.2x+12.4

Answers

It is gonna be the last one so d
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