10y + 2y to the second - 6y to the third + 8y to the third. You have to combine like terms.

150.6

all i did was i multiplied 5.02 by 30

the answer is d

step-by-step explanation:

you can also use mathway to get you answer + steps

46

step-by-step explanation:

given

height = 168 cm

formula

height =2.47*f+54.13

solution

168 = 2.47f + 54.13             subtract 54.13 from both sides

168 - 54.13   = 2.47f             combine

113.87 = 2.47f                     divide by 2.47

113.87 / 2.47 = f                   combine

46.1 = f  

answer: 46 cm