
First, find the number of females in the class. 
Then, just write the ratio. 
Step-by-step explanation:
(x+2y)(x-2y)
- x^2-2xy+2xy-(2y)^2
- x^2-4y^2
Answer:
Carter scored 21 points
Step-by-step explanation:
If Denise scored 3 fewer points, then you would add three to 18 to get the number of points that Carter scored.
18 + 3 = 21
1 foot = 12 inches
12 * 5 = 60 and 8 * 12 = 96
Therefore, 60 inches is a shorter length than 8 feet.
Using the percentage concept, supposing 520 out of 1000 respondents believe in global warming, 52% of respondents agreed that global warming is occurring.
<h3>What is a percentage?</h3>
The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:

In this problem, we suppose that 520 out of 1000 respondents believe in global warming, hence a = 520, b = 1000, and the percentage is of:

More can be learned about the percentage concept at brainly.com/question/10491646