Answer:
$6.70
Step-by-step explanation:
Adrian purchases a book for 4.86 and a poster for 3.44
The total amount he owes would be 4.86 + 3.44 = $8.30
If she gives the cashier 15 dollars she should receive 15 - 8.30 = $6.70 back.
Set it up like this:

. Then you would cross multiply which would result in:

. Divide by 9 on both sides and

.
Perimeter is:
(Length x 2) + (width x 2)
So basically:
(115 mm x 2) + (61 x 2)
<span>Hope that helps and correct me if I'm wrong!</span>
Answer:
410 cm
Step-by-step explanation:
Can;t really give an explanation for this one. there are 40 cm in an inch