Answer:
A) 0.030
B) 0.026
Step-by-step explanation:
I hope this HELP! :)
![\frac{42}{j} = \frac{35}{55}](https://tex.z-dn.net/?f=%20%5Cfrac%7B42%7D%7Bj%7D%20%20%3D%20%20%5Cfrac%7B35%7D%7B55%7D%20)
to solve for j first you need to cross multiply;
j × 35 = 42 × 55
35j = 2,310
j = 2,310 ÷ 35 (did the inverse operation)
j = 66
Hope that helps :D
Step-by-step explanation:
-t = 9(t-10)
-t = 9t - 90
90 = 9t + t
90 = 10t
90 ÷ 10 = t
9 = t
Two cheaper books = x
more expensive = 1.5x
so, 2.5x=150
150/2.5=x=60
therefore the more expensive book = 90