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Line M is represent… - QuestionCove
OpenStudy (anonymous):

Line M is represented by the following equation: x − y = 8 Which equation completes the system that is satisfied by the solution (18, 10)? 2x − y = 26 x + y = 18 2x − 2y = 36 x − y = −28

2 years ago
OpenStudy (anonymous):

@angel_mejia

2 years ago
Vocaloid (vocaloid):

(18,10) tells us that x = 18 and y = 10 so, go through each answer choice one by one, and plug in x = 18 and y = 10, and see which one is true

2 years ago
OpenStudy (anonymous):

c? @Vocaloid

2 years ago
Vocaloid (vocaloid):

nope, check your math again

2 years ago
OpenStudy (anonymous):

b?

2 years ago
Vocaloid (vocaloid):

please do not guess, go through each answer choice one by one and plug in the numbers

2 years ago
Vocaloid (vocaloid):

start with the first choice: 2x − y = 26, true or false?

2 years ago
OpenStudy (anonymous):

I'm having really hard time and have a huge time crunch

2 years ago
Vocaloid (vocaloid):

again, start with the first choice... 2x - y = ?

2 years ago
OpenStudy (anonymous):

i don't even know where to start :c

2 years ago
Vocaloid (vocaloid):

x = 18 y = 10 2x = ?

2 years ago
OpenStudy (anonymous):

36?

2 years ago
Vocaloid (vocaloid):

right, so 2x - y = ?

2 years ago
OpenStudy (anonymous):

26

2 years ago
Vocaloid (vocaloid):

right. the first choice says that 2x − y = 26, so this is our answer

2 years ago
OpenStudy (anonymous):

thank u sm,can u do another plz?

2 years ago
Vocaloid (vocaloid):

sure

2 years ago
OpenStudy (anonymous):

give me one sec

2 years ago
OpenStudy (anonymous):

Line M is represented by the following equation: x + y = −1 What is most likely the equation for line P so the set of equations has infinitely many solutions? 2x + 2y = 2 2x + 2y = 4 2x + 2y = −2 x − y = 1

2 years ago
Vocaloid (vocaloid):

hint: multiply x + y = -1 by 2 on both sides

2 years ago
OpenStudy (anonymous):

im so confused ;c

2 years ago
Vocaloid (vocaloid):

just multiply everything by 2.... x + y = -1

2 years ago
OpenStudy (anonymous):

so x+y=-1 multiplied by 2 would be 2x+2y=-2?

2 years ago
Vocaloid (vocaloid):

yes, and that's your answer

2 years ago
OpenStudy (anonymous):

thank u! one more?

2 years ago
Vocaloid (vocaloid):

sure..

2 years ago
OpenStudy (anonymous):

Two lines, A and B, are represented by the following equations: Line A: y = x − 1 Line B: y = −3x + 11 Which of the following options shows the solution to the system of equations and explains why? (3, 2), because the point does not lie on any axis (3, 2), because one of the lines passes through this point (3, 2), because the point lies between the two axes (3, 2), because both lines pass through this point

2 years ago
Vocaloid (vocaloid):

hint: first multiply line A by 3

2 years ago
OpenStudy (anonymous):

y=x -3?

2 years ago
OpenStudy (anonymous):

@Vocaloid

2 years ago
Vocaloid (vocaloid):

not quite, you need to multiply EVERYTHING by 3

2 years ago
OpenStudy (anonymous):

3y=3x-3

2 years ago
Vocaloid (vocaloid):

right, next step: line A: 3y = 3x - 3 line B: y = -3x + 11 now add line A + line B

2 years ago
OpenStudy (anonymous):

3y=0x+14

2 years ago
Vocaloid (vocaloid):

nope, check your math again... 3y + y = ?

2 years ago
OpenStudy (anonymous):

im not sure

2 years ago
Vocaloid (vocaloid):

3y + y = __y fill in the blank

2 years ago
OpenStudy (anonymous):

4y

2 years ago
OpenStudy (anonymous):

what does y equal?

2 years ago
Vocaloid (vocaloid):

we're about to find out! now, when we add line A and line B together, we get 4y on the left side. and -3+11 on the right side. so 4y = -3+11

2 years ago
Vocaloid (vocaloid):

-3+11 = ?

2 years ago
OpenStudy (anonymous):

8

2 years ago
Vocaloid (vocaloid):

right. so 4y = 8 what is y?

2 years ago
OpenStudy (anonymous):

4?

2 years ago
Vocaloid (vocaloid):

4y = 8 divide both sides by 4, what do you get?

2 years ago
OpenStudy (anonymous):

1,2

2 years ago
Vocaloid (vocaloid):

right, so we get y = 2

2 years ago
Vocaloid (vocaloid):

now we go to our second equation: y = -3x + 11 now we plug in y = 2 2 = -3x + 11 what is x?

2 years ago
OpenStudy (anonymous):

I'm sorry i have to go to lunch with my fan and this is my last question, can i plz just have the answer

2 years ago
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