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

dnji

step-by-step explanation:

dskfbipo

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.