X=7 because 7-3 = 4, 7+8= 15,15x4=60.
Answer:
Slope is 5.
Step-by-step explanation:
y + 3x = 8x -7
y = 5x - 7
coefficient in front of x is the slope/rate of change once you get the equation slope intercept for y = mx + b. m is the slope.
1.

Answer D.
2.
From secant theorem, we know, that:

and from picture:

So we can calculate:
The answer to the problem is 8