You'd simply have to find 20% of $40. To find the percent of a number, you would change the percent into an actual decimal/number, and then multiply them both. So the percent would become 0.20.
40 × 0.20 = 8
So now you would subtract 8 from the cost of 40.
40 - 8 = 32.
The shirt costs $32.
800+16x=720+21x
80+16x=21x
80=5x
X=16
So 16 hours :)
Answer: The answer is − 5 plus per centimeter
Hope this helps :)
5p² - p - 18 = (5p +9)(p - 2)
