The strings cost $14. you would take the total cost ($72) and subtract the cost of the book ($16) and you would get $56. you would then divide 56 by the number of book bought (4 in all) and you would get $14.
Given:
The side of a square a, s+3.
The perimeter of a square is the sum of the four sides of the square. Hence,

Answer:
x² - 30 + 5x
Step-by-step explanation:
(x + 5)(x − 5)
=x(x − 5)+5(x − 5)
=x² - 5 + 5x - 25
=x² - 30 + 5x
Answer:
27.7% of third year girls study biology
Answer:
5 pounds
Step-by-step explanation:
40 divided by 8 = 5