Lesson 3 unit 7, solving systems using elimination quiz 1. (i've already answered this) 2. what is the solution of the system? 7x + 5y = 19 -7x - 2y = -16 (a). (2, 1) (b). (1, 2) (c). (7, 5) (d). (-7, -2) 3. which method would be the simplest way to slove the system? y = 1/2x 2x + 3y = 28 (a). graphing (b). substitution (c). elimination (d). distributive 4. what is the solution of the system? y = -3x 3x + 2y = 6 (a). (2, 6) (b). (-1, 3) (c). (-2, 6) (d). (1.5, -4.5) 5. how many solutions does this system have? -3x + 6y = 10 -3x + 6y = -4 (a). none (b). one (c). infinite (d). two 6. in wich quadrant does the solution of the system fall? y = x - 1 y = -3x - 5 (a). i (b). ii (c). iii (d). iv

2) A

3) B

4) C

5) A

6) C

Step-by-step explanation:

2) Lets add 2 equation together, we will find:

If we put y value in the first equation:

It is A

3) Substation is the best way to solve the system.

Lets multiply first equation with 4:

Substitute 2x with 4y:

and x=8

4) Again lets substitute 3x with -y:

Therefore x=-2

Correct answer is C

5) None of real numbers is the solution of this system.

6) First lets multiply first equation with -1 and add equations together:

It falls to III

The answer is C

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.

the answer would be 44.79

plz mark brainliest

step-by-step explanation: