Question

how do you do #3? if you can please 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 :/)

Answer 1

Hello from MrBillDoesMath!

Answer:

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