Question

A student is trying to solve the system of two equations given below:

Equation P: y + z = 6
Equation Q: 5y + 9z = 1

Which of the following is a possible step used in eliminating the y-term?

(y + z = 6) ⋅ 9
(y + z = 6) ⋅ −5
(5y + 9z = 1) ⋅ 9
(5y + 9z = 1) ⋅ 5

Answer 1

@Preetha

Answer 2

please help me

Answer 3

i gave you a medal

Answer 4

You want to eliminate y terms, so you would want coefficient of y to be same, so you can just subtract equations there, right?

Answer 5

I was thinking B or C

Answer 6

alisurfcat i gave you a medal

Answer 7

So for first equation, coefficient of y is 1. In second equation, it is 5.

So you want to multiply first equation by 5 so you can subtract. (Or -5 then add)

Answer 8

Right?

Answer 9

she right

Answer 10

I think so, so it will be B?

Answer 11

yes

Answer 12

thanks

Answer 13

your welcome