I need step by step help how to work this out

31.73

Step-by-step explanation:

x = 2.1

y = 3.7

Substitute;

yes. we do proportions in probabilities.

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 !