Carlos is saving up to buy two new books. he has saved 60% of one book that costs 18$, and 30% of the cost of another book that costs 21$. how much more does he need to save?

The answer to your question is: $61

Step-by-step explanation:

Data

Book 1 = 60% that costs $18

Book 2 = 30% that costs $21

Process

        Book 1

                          60% $18

                       100 %      x

                          x = (100x 18)/60 = $30 actual cost

                      He needs to save 30 -18 = $12

     Book 2

                      30%  $21

                     100%   x

                      x = (100 x 21) / 30 = $70 is the actual cost

                   He needs to save 70 - 21 = $49

Total

             $49 + $12 = $61 needs to save to buy two books

answer: was that a question or answer?

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.