3 Select the correct answer. The variable y varles directly as x. When x = 20, y= 12. What is the value of y when x= 15? А. 7 B. 9 C. 18 D. 25

B

Step-by-step explanation:

Given y varies directly as x, then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition when x = 20, y = 12, then

12 = 20k ( divide both sides by 20 )

k = =

y = x ← equation of variation

When x = 15, then

y = × 15 = 9

step-by-step explanation:

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.