Rebecca and megan are shopping at a store that sells jewelry, scarves, and purses. the cost of all the items at the store include tax. megan buys 3 bracelets and 3 necklaces. each bracelet costs $5. megan pays the clerk $40 and gets $4 change. what is the cost, in dollars, of one necklace? question 7 options:

$7.00
$8.33
$12.00
$21.00

$7

Step-by-step explanation:

Rebecca and Megan are shopping at a store which sells jewelry, scarves, and purses. Megan buys 3 bracelets and 3 necklaces. One bracelet costs $5 and Megan pays the clerk $40 and gets $4 change.

From the question, since Megan pays $40 and collects $4 change, then the total cost is $40-$4 = $36.

Let the bracelets be denoted by b and necklace be denoted by n. Since Megan buys 3 bracelets and 3 necklaces, bracelet is $5 and total cost is $36. This will be:

3b + 3n = 36

3(5) + 3n = 36

15 + 3n = 36

3n = 36 - 15

3n = 21

n = 21/3

n = 7

A necklace costs $7.

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5