korbinwilkinsen
contestada

I NEEED HELP ASAP PLEASE

Ashur solves the following system of linear equations.

-3a+7b=-16
-9a+5b=16

Which statement about the solution to this system can he say is true?
The values of a and b are both equal to –4.
The values of a and b are both equal to 4.
The value of a is equal to 4, and b is equal to –4.
The value of a is equal to –4, and b is equal to 4

Respuesta :

-3a+7b=-16
-9a+5b=16

multiply 1st equation by 3

-9a + 21b = -48
-9a + 5b =16
------------------------subtract
 16b = -64
     b = - 4

-3a+7b=-16
-3a+7(-4)=-16
-3a = -16 +28
-3a = 12
   a = -4

answer
a. first choice

The values of a and b are both equal to –4.
Allo55

Answer: The values of a and b are both equal to -4

Step-by-step explanation: I am taking the quiz right now but most likely not when you are reading this so if it’s wrong then I don’t know because I haven’t submitted on eduinuity

Otras preguntas