Mike can assemble a computer table in 40 minutes and i can do it in 60 minutes. if mike works for 20 minutes before i join him, how long will it take us to finish

understand that i don't know the answers

will someone answer his question

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 !