B. Barbara spends 16 of her time on the phone. How many hours does she have to work in a week so that she spends 5 hours on the phone?

A.

x*(2/5) = 10

Solve for x.

B.

y*(1/16) = 5

Solve for y

C.

t*(2/17) = 5

solve for t

Step-by-step explanation:

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problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !