Which statement correctly explains how andre could find the solution to the following system of linear equations using elimination?
8s-9t=15
7s-2t=12

See explanations

Step-by-step explanation:

The first equation is:

The second equation is

To eliminate t, Andre can multiply the first equation by -2  and the second equation by 9 to obtain:

When he adds the two equations he gets:

If Andre wants to eliminate s, he can multiply the first equation by 7 and multiply the second equation by 8 to get:

He then subtracts to get:

There are other few ways Andre can do this.

Since you have not provided the options, we can tell exactly what Andre did.

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0

the correct answer is 5 6 and 7