How do you do #3? if you can take a picture or just explain the process, not just the answer. (i don’t need a super detailed explanation it’s just it was assigned as hw even tho my teacher didn’t teach it to us : /)

Hello from MrBillDoesMath!

z = 28 (y/x)

Discussion:

" z varies inversely with x and directly with y"  translates into

z = k * (y/x)                 (*)

Substituting x = 2, y = 3, z = 42  in (*) gives

42 = k (3/2)                        =>   multiply both sides by 2/3

42 (2/3) = k (3/2)(2/3)         =>  42(2/3) = 28; (3/2)(2/3) = 1

28 = k

Conclusion:

z = 28 (y/x)

Thank you,

MrB

three-fourths of an hour

36÷48=0.75

0.75=

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)