Answer:
Slope is -3.
Step-by-step explanation:
The equation to get the slope is y2-y1/x2-x1. So, plug in the points to the equation. -7-8/7-3 = -15/5 = -3/1 = -3.
Answer: 2
Step-by-step explanation:
By the geometric mean theorem,

Explanation
Sorry but You gone have to higher the price for this, this is a big question.
Answer:
2
Step-by-step explanation:
2x+2y=12.........&
6x-2y=20.........$
&+$: 8x=32
x=4
2*4+2y=12
y=4