7x+3y=22 4y=20 I need to know how to write this equation out with the answer

Answers

Answer 1

Answer: $\begin{cases} 7x+3y=22 \n 4y=20 \ \ /:4 \end{cases}\n \n\begin{cases} 7x+3 \cdot 5=22 \n y= 5 \end{cases}\n \n\begin{cases} 7x+15=22 \ \ |-15 \n 4y=20 \end{cases}$

$\begin{cases} 7x+15 -15=22 -15 \n y=5 \end{cases}\n \n\begin{cases} 7x =7\ \ / :7 \n y=5 \end{cases}\n \n\begin{cases} x =1 \n y=5 \end{cases}\n \n$

Answer 2

Answer: 7x+3y=22
4y=20

4y=20
y=5

Substitute to first equation
7x+15=22
7x=7
x=1

Related Questions

Fran brings home $225 per week working 15 hours of which she is able to save $40. Fran wants to have $1,400 saved at the end of 20 weeks. She may work up to 18 hours per week if she wants. She can save all of the money earned working the extra hours. Which of the following statements is true?a. Fran will meet her goal working 15 hours per week. b. Fran must work 17 hours per week to meet her goal. c. Fran must work 18 hours per week to meet her goal. d. Fran will not be able to reach her goal.
Evaluate the expression. write answer without exponets64 to the 1/2 power
Determine the solution of the equation x2 = 36. Select each correct answer.A. x = -46B. X = 6O C. X = 18D. X = -6O E. X = 16O Ex= -18
Explain why it is necessary to rename 4 1/4 if you subtract 3/4 from it
Admission to the county fair is $5. And it costs and additional $0.50 for each ride ticket. What inequality represents this problem

Cristina bought a bag of coffee for $8.47. The weight of the bag was 7/8 of a pound. What was the price, per pound, of the coffee?

Answers

~For this problem, you need to divide.
~The easy way that I think might help you is if you change the fraction into a decimal.

$(7)/(8) = 0.875$

Now divide $8.47 by 0.875
$(8.47)/(0.875) = 9.68$

The price per pound of the coffee was $9.68

$8.47/ (7/8 pound)= $9.68/pound.

The price of the coffee is $9.68/pound~

Mara's family is driving to her grandmothers' house. The family travels 239.4 miles be-tween the hours of 9:10 a.m. to 1:40 p.m. Write an equation that Mara can use to deter-
mine their average rate of travel, rounded to the nearest mile per hour.
Use the given numbers and operations to complete an equation.

Answers

Answer:

Give brainliest please! The answer is 53.2 mph

Step-by-step explanation:

Mara's family travels 239.4 miles between the hours of 9:10 a.m. to 1:40 p.m.

1:40 p.m. is 13:40.

Thus, they traveled for

13 hours 40 minutes - 9 hours 10 minutes = 4 hours 30 minutes

that is hours.

Use formula:

where

D = distance

r = rate

t = time.

In your case,

D = 239.4 miles

t = 4.5 hours

Which of the following is equivalent to √-50a) 5√2
b) 5i√2
c) 5√2i
d) -5√2

Answers

$√(-50)=√(-1\cdot50)=√(-1)\cdot√(50)=i√(25\cdot2)=i√(25)√(2)=\boxed{5i√(2)}$

Answer b)

Option (D) is the answer
-5 root2

The data set represents the number of rings each person in a room is wearing.0, 2, 4, 0, 2, 3, 2, 8, 6

What is the interquartile range of the data?

Answers

Answer: 4

Step-by-step explanation:

First arrange the given data in ascending order :-

$0,0,2,2,2,3,4,6,8$

Number of terms = 9

Second quartile =Median= $(9+1)/(2)=5^(th)\ term=2$

Now, the first quartile $Q_1$ =The median for the lower half of data

= Mean of 2nd term and 3rd term

$=(0+2)/(2)=1$

The third quartile $Q_3$ =The median for the upper half of data

= Mean of 7th term and 8th term

$=(2+8)/(2)=5$

Now, Interquartile range = $Q_3-Q_1=5-1=4$

Hence, the interquartile range of the data =4.

Answer:

Step-by-step explanation:

♥☺

Raphael paid $652 for a camera during a 20% off sale. What was the camera's regular price? Please work the problem and show your work so I can understand it better.

Answers

$x-\ regular\ price\n\nx-(20\%x)=652\n\nx-(0,2*x)=652\n\nx-0,2x=652\n\n0,8x=652\ \ \ \ |divide\ by\ 0,8\n\nx=815\n\nCamera\ earlier\ cost\ 815\$.$

Four hunndred seven trillion, nintey million seven hundred forty-two thousand seventy-two

Answers

Answer:470,000,90,742,72

Step-by-step explanation:

Other Questions

A right rectangular prism has a length of 5 cm, a width of 8 cm, and a height of 4 cm.What is the volume of the prism?Enter your answer in the box.I believe it is 160.

A company has two electric motors that consume varying amounts of power. The power consumed by each motor is a function of the time (t in minutes) for which it runs. The cost of power (in $) to run one motor is given by the function `C_a(t) = t^2 - 2t + 5`. The cost of running the second motor is given by `C_b(t) = 3t + 2`. Which function gives the total cost of running both motors?

Find the angle between the given vectors to the nearest tenth of a degree.u = <-5, -4>, v = <-4, -3>

a car is stopped at a red light when the light turns green the car accelerates at 20 ft/sec/sec how long does it take for the car to go 1000 ft