Answer:
These are two secant lines meaning we can use theorem 6-17 to find the value of x: 6x + 8x times 8x = 16 times 7
14x times 8x = 112
112x^2 = 112
x^2 = 1
x = 1
x=1
Step-by-step explanation:
(whole secant) x (external part) = (whole secant) x (external part)
(9+7) *7 = (6x+8x)*8x
16*7 = 14x*8x
112 =112 x^2
Divide by 112
112/112 = 112x^2/112
1 = x^2
Take the square root
1 =x
