TIMED ASSESSMENT The sum of the circumferences of circles A, B, and C is 63 7. Find AC.

Work must be shown

AC = 28

Step-by-step explanation:

small circle circumference = π2x

medium circle = π6x

large = π10x

π2x + π6x + π10x = 63π

π18x = 63π

18x = 63

x = 3.5

AC = 3x + 5x = 8x

AC = 8 x 3.5 = 28

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

b, 20 yards

step-by-step explanation: