Dan wants to work out the answer to 51 - 19. Write a simpler calculation in the box below that he could use to estimate the answer.
Dan thinks that 51 - 19 = 42. Explain why Dan cannot be correct.

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

answer:

f(5/2) = 10/3

i hope this you!

idek

step-by-step explanation:

21

jk it's 20

step-by-step explanation:

idk wbu

step-by-step explanation: