Michael bought 1500 seeds for his three gardens . the ratio of the number of seeds planted in garden a to the number of seeds planted in garden b to the number of seeds planted in garden c is 3: 5: 7 . each of the seeds in garden a cost 10 cents , while each of the seeds in garden c cost half of that . in total he spent $110 on the seeds . how much did he spend on the seeds for garden b ?

First of all you need to find the total ratio in order to find the number of seeds in each garden.

Total ratio = 3 + 5+7

                 = 15

The number of seed in garden a = ratio of garden a/ total ratio x 1500

                                                      = 3/15 x 1500

                                                       = 300 seeds

since each of the seeds in garden a cost 10 cents , then the cost of 300 seeds  = 300 x 10 = 3000 cents

                              = $ 30 ( 100 cents = $1 )

The number of seeds in garden c = 7/15 x 1500

                                                         = 700 seeds

each seed in garden b cost 5 cent, cost of 500 = 700 x 5 = 3500 cents

                                                                                                = $35

The number of seeds in garden b = 5 / 15 x 1500 = 500 seeds

It was said that $ 110 was pent in all, so the amount spent on c = $110 - ( $30 + $35)

  = $110 - $65

 = $45

Step-by-step explanation:

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign