Answer:

Step-by-step explanation:
We want to evaluate
when a=1 and b=5.
We just have to substitute the value of a and b into the given expression and simplify.

This simplifies to:

This will finally give us;

10x²+15x-70= 5(2x² +3x - 14)= 5(2x+7)(x -2)
(2x+7)(x -2) = 2x²+7x-4x-14 = 2x²+3x-14
correct answer is A
Slope Formula- y2-y1/x2-x1. So let's plug our x and y's. 8-2/4-6=6/-2=-3. And that's our answer.
It should be 0.925, 1/4*3.7=0.925 hope this helps!