Moniker used substitution to solve this system of equation. which equation could be the result of her first step

Step-by-step explanation:

We have the two equations as,

3a+b=225 and b=a-15

So in the substitution involved here its better if we substitute the second equation into first one.

We have the term b=a-15 so on directly substituting we get

4a=240,

a=60.

hence b would be 45.

In this way its better to substitute second one in the first one giving the following,

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

the first one, all those points on the line just make a strait line.