9 pencils cost $7.74 Which equation would help determine the cost of 6 pencils?

a. 6/X = 9/ 7.74
b. X/6 = 9/7.74
c. 9/6 = X/7.74
d. 6/X = 7.74/9
please help me

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x