10. What is the value of x in the solution to the system of equations?
x – 2y = 7
3x + 2y = 21
+/-

Answers

Answer 1

Solve for x in first equation:

x-2y=7

Add “2y” to both sides

x=2y+7

Put this in to second equation:

3(2y+7)+2y=21

Solve for y:

Distribute the 3 into the ()

6y+21+2y=21

Combine the like y terms

8y+21=21

Subtract 21 from both sides

8y=0

Divide by 8 on both sides

y=0

Put this into the first solved equation:

x=2(0)+7

Solve for x:

Multiple 2(0)

x=0+7

Add 0 and 7

x=7

So the value of x is positive 7.


Related Questions

Frenando finished 6/8 of his homework greta finished 6/8 of her homework find a fraction that represent the amount of work that greta finished in a different form but equal to 6/8

Answers

Answer:

3/4

Step-by-step explanation:

you can write it in a different form by simplifying. 6/2 = 3. 8/2 = 4 so the answer is 3/4

Tell whether each function is linear or nonlinear. Use the drop-down menus to show your answer.

Answers

function a is non linear while function b is linear

explanation: for function a, y is increasing at a non linear rate (not consistent)

Write an equation of the line that passes through (-2, 3) and is parallel to the line y= 2x-4​

Answers

Answer:

A hi esta la solucion

Step-by-step explanation:

Answer:

y=2x+7

Step-by-step explanation:

Since the answer HAS to be parallel to the line y=2x-4, that means the only number that should change is the y-intercept (the last number in the equation.) y-intercept is the x-value when y=0, which basically means, if you put the line onto a graph, look for the point when the line passes through the y-axis, then look at how far up or down that point is (x-value). That will be your answer. Since the line passes through the y-axis at x=7, the answer is y=2x+7! Sorry if this is too confusing, I'm not good at teaching XD

Solve: 1,243 = 12
Show the remainder as a fraction.

Answers

If you meant 1243/12 then the answer is 103 and 7/1243

Which description of the vector shown is correct?
O The magnitude is 15, and the direction angle is
approximately 49º.
O The magnitude is 15, and the direction angle is
approximately 41°.
O The magnitude is 113, and the direction angle is
approximately 49°
O The magnitude is 113, and the direction angle is
approximately 41°

Answers

Answer:

D

Step-by-step explanation:

Edge 2020

Answer:

D

Step-by-step explanation:

My mom likes to support my efforts on the cycling team, so she is always there to watch me race. At the last race, she became so excited that she promised to buy me 4 cupcakes for every three laps I completed. I completed a whole race, a whopping 24 laps! How many cupcakes did my mom buy me? Just write a number for an answer.

Answers

Answer:

I think that the answer is 32 cupcakes. I am sorry if this is wrong, but go subscribe to me at SSSniperwolf and LittleLia.

Step-by-step explanation:

Like 32-34 I think.
..

idk what i'm doing :(

Answers

Here is an equation for those numbers you can write this multiple ways but this is the easier form

y+1/y-1 = 2y+3/2y+5 simplify​

Answers

Answer: y=0.6 I think (try checking with other answers first)

Hope this helps a little and good luck :)

Step-by-step explanation:

Help ME PLEASE !9 POINTS !!!

Answers

Answer:

5x7x6= 210

Step-by-step explanation:

Answer:

the area is 36

Step-by-step explanation:

use (a+b/2)h

or use google lol

(5+7/2)6 - numbers in formula

(12/2)6 - parentheses

(6)6 - parentheses

36 - multiply

hope that helped

sports drinks- $1.75
pizza- $2.25

Answers

Answer:

7 drinks

Step-by-step explanation:

7x1.75=12.25

4 x 2.25= 9

added - 21.25

please help me and can you explain thank you

Answers

Answer:

(4,2), there is already a 4 in x value

Step-by-step explanation:

A store manager instructs some new trainees that a video game priced at $53 winds up
costing a customer $55.65 once the sales tax is included. What is the sales tax percentage?

Answers

Answer:

the answer is $57.67

Step-by-step explanation:

the way I found that solution $1.59 was 3% which winds up being 6% of the normal cost of the game which will be $57.77

4. The graph of a linear function is shown. Which best
describes the slope of the line?
A. Zero Slope
B. Undefined Slope
C. Negative Slope
D. Positive Slope

Answers

Negative slope So c

PLEASE HELP ME

ILL GIVE YOU BRAINIEST

PLEASE ASAP

Answers

Answer:

b

Step-by-step explanation:

Will mark brainliest for whoever answers

Answers

Answer:

No

Step-by-step explanation:

You have to do it.

The equation 2x-7=5+x has exactly one solution. True or false

Answers

Answer:

True

Step-by-step explanation:

x=5+7=12

The only solution is x=12.

Need help !!!! thanks

Answers

Answer:

same side interior, and adjacent

Step-by-step explanation:

find the slope of the graph​

Answers

Answer:

It's undefined. x=4

Step-by-step explanation:

It’s undefined a undefined slope is a line that goes straight up and down

Write the sum as a product of two factors
27w+15

Answers

Answer:

I'm pretty sure it is 1.8.

Step-by-step explanation:

what percent of 16 is 75? round to the nearest hundredth

Answers

Answer:

-21.3333333333%

negative twenty-two point three percent repeating

Write the ratio as a fraction in simplest form, with whole numbers in the numerator and denominator.
16 gal : 24 gal

Answers

2:3 . you divide the numbers by the greatest factor. which is 8. 24 divided by 8 is 3, 16 divided by 8 is 2. =2:3

WILL GIVE BRAINLIEST PLEASE HELP URGENT
Harris graphs the system of equations to determine its solution.

5x−y=55x+y=15

What is the correct solution?

Enter your answer by filling in the boxes. (__,__)

Answers

(1/2, -25/2). because 60x=30 , x=1/2,5x1-2-y=15, y=-25/2.

The intersection point of a system of equation is the solution of the system.

The solution to the system of equations is (2,5)

The equations are given as:

[tex]\mathbf{5x - y = 5}[/tex]

[tex]\mathbf{5x + y = 15}[/tex]

See attachment for the graphs of [tex]\mathbf{5x - y = 5}[/tex] and [tex]\mathbf{5x + y = 15}[/tex]

From the graph, the point of intersection is (2,5).

Hence, the solution to the system of equations is (2,5)

Read more about system of equations at:

https://brainly.com/question/12895249



The tables show four relationships between x and y. In which table is there a NEGATIVE rate of change?
A)ᴛᴀʙʟᴇ ᴀ
B)ᴛᴀʙʟᴇ ʙ
C)ᴛᴀʙʟᴇ ᴄ
D) ᴛᴀʙʟᴇ ᴅ

ɪ'ᴍ sᴛᴜᴄᴋ ᴏɴ ᴛʜɪs ᴏɴᴇ ᴛᴏᴏ!
ᴀɴʏᴏɴᴇ ᴋɴᴏᴡ ᴛʜɪs ᴏɴᴇ?

Answers

Answer:

C

Step-by-step explanation:

Try using a scratch piece of paper to graph the points of each table to see which one would have a negative slope. Or use the formula y1-y2/x2-x1 to find the slope and see which one is negative.


Find the solution of this system of equations:
X - 10y = -59
-4x + 10y = 86
0 (-9,5)
(5,9)
(5,-9)
(9,-5)

Answers

Answer:

y=-3.667

x=

Step-by-step explanation:

-4(10y-59)+10y=86

30y+196=86

30y=-110

y=-3.667

Solve -2a - 5>3
Which graph shows the solutions?

Answers

-4>3

Step-by-step explanation:

Answer:

First line

Step-by-step explanation:

Isolating 2a is the first step, so adding 5 to each side. That leaves -2a > 8. Divide both sides by -2, and because it's a negative, you flip the sign. so you get a < -4

Need help on this thank you if you help

Answers

Answer:

a. 2/5

b. 1/2

c. 100/9

Step-by-step explanation:

a: Multiply bottom and top by 100 to keep values the same and make the fraction a whole fraction:

.12 × 100 = 12

.3 × 100 = 30

Simplify: 12/30 = 2/5

b: Multiply bottom and top by 1,000 to keep values the same and make the fraction a whole fraction:

.125 × 1,000 = 125

.25 × 1,000 = 250

Simplify: 125/250 = 1/2

c: Multiply bottom and top by 100 to keep values the same and make the fraction a whole fraction:

4 × 100 = 400

.36 × 100 = 36

Simplify: 400/36 = 100/9

log b x= y
Which variable can be negative???

Answers

Answer:

last one

Step-by-step explanation:

3.
Solve using traditional division: 3,385 divided by 31.

Answers

Answer:

109.193548

Step-by-step explanation:

Answer:

109 r6

Step-by-step explanation:

Can someone help me with this question

Answers

Answer:

Step-by-step explanation:

All real numbers

At the beginning of a laboratory experiment, the temperature of a substance is -12.6 °C. During the experiment, the temperature of the substance decreases 7.5 °C. What is the final temperature of the substance?
!!!!SHOW YOUR WORK!!!!

Answers

Answer

20.1°C

Step-by-step explanation:

-12.6 °C - 7.5 °C =-20.1°C

Answer:

the initial temperature= -12.6⁰c

change in temperature= 7.5⁰c

the final velocity = x

-12.6-7.5=x

-20.1=x

so therefore the final temperature is -20.1

Other Questions
Hi I will Venmo or cash app 50$ to whoever can get all my school work in a week 8th grade btw. A kind of sedimentary rock formed from plant material over a long period of time is __________.a.limestoneb.cementationc.coald.compactionPlease select the best answer from the choices providedABCD Because of the Gault case, children and their families now have which of the following rights when charges are brought?(i) Parents must be notified(ii) The right to refuse to testify against oneself(iii) The right to question witnessesA.i onlyB.ii onlyC.ii and iii onlyD.i, ii, and iiiPlease select the best answer from the choices providedABCD Which three lines in the poem are examples of alliteration? Determine whether each set of numbers can be the lengths of the sides of a triangle. complete a chart like the one below to show the actions taken by the first and second continental congresses. there a chart that have sides one is first continental congresses and second it does not let me post pic of it Min was writing about changes in the state of matter for a research paper. Which of these changes might she include as examples of sublimation?Choose the two statements that apply.A. Clothing is hung outside on a day when the temperature is below the freezing point of water. The clothes dry, even though they freeze first.B. An ice cube melts on the floor, then it evaporates.C. Bromine is a reddish brown, liquid element. In a closed container, a reddish brown gas exists above the surface of the bromine.D. Dry ice changes directly to carbon dioxide gas There are 32 females cast in the school play. The ratio of male roles is 3:8. How many males are cast in the school play Sarah works 6 hours a day, Monday through Friday. What is her pay for a week? A recipe calls for 2/3 cups of sugar per batch. Elena used 5 1/3 cups of sugar to make multiple batches of cookies. How many batches did she make? Justify this statement "Density of the impure water is greater than of pure water. 8. (LC)What is one way the second Industrial Revolution differed from the first Industrial Revolution? (1 point) Someone please Help please When you are measuring your pulse (heart beats per minute) what system are you monitoring?A. DigestiveB. RespiratoryC. CirculatoryD. Integumentary (skin) A map of Long Island has the scale 2.75 cm= 16km. On the map, target Rock is 23.2 cm from Lake Montauk. Find the distance from Target Rock to Lake Montauk. PLEASE HELP ASAP Lee y elige. Read the blog entry that Rocio writes about the city of Santo Domingo. Then choose the word or phrase that bestcompletes each sentence.El blog de RocoQu tal, amigos?Les escribo desde Santo Domingo, en la Repblica Dominicana: una ciudad antigua, bonita y colonial. Aqui hay casas de piedra y ladrillo.Estas casas tienen ventanas grandes y balcones con flores de muchos colores. Muchas de las casas tienen electrodomsticos modernoscomo lavaplatos, secadoras y microondas. La gente es muy trabajadora y amable! Yo estoy tomando muchas fotos de esta ciudad. En laavenida principal hay un caf donde mi familia y yo vamos para almorzar y hablar. Qu interesante es esta ciudad! Maana escriboms.1. Rocio escribe desde unaantigua, colonial y bonita.plaza -- casa -- ventana -- ciudad2. Las casas son depiedra y ladrillo -madera y papel - piedra y papel - madera y ladrillo3. Las casas tienen ventanas grandes y plazas-floreos-balcones-cortinas Can you think of a time when the connotation of a word (or words) you used was interpreted with the wrong denotation or connotation, or when you misinterpreted a word`s connotation or denotation? Explain what happened and how you dealt with the confusion. 3. Find f(2) given f(x)=3x^2+ 2x + 16 Specialized Cells and tissuesTAWhat is the function of muscle tissue?O A. To contract to cause movement in the bodyOB. To cover the body to protect other cellsC. To transport materials and defend the bodyO D. To send signals to control the body In CIVIL LAW, what is a PLAINTIFF? Arun's restaurant bill is $58, and he wants to leave the waiter an 18 percent tip. What will Arun's total be?