There would be 25 girls. You would turn it into a fraction and times both by 5 to get 20/25. 5/4=1.25 and 25/20=1.25 in case you need to check your work
Answer:
The answer is 21
Step-by-step explanation: You substitue 3 for C and 4 for D and craete the equation 
so you add 3+4=7 and you get 
which is 7 times 3 =21
Answer:
Step-by-step explanation:
I believe it is the 2nd one its the most logical
32+48 = 80
Four equivalent expressions are:
40+40 = 80
20+60 = 80
10+70 = 80
30+50 = 80
The best option is to multiply them together, there would be no value that is common between the two, (2m - 1)(2m + 5), and leave it in this form.
However, there is a second method.
Notice how between the two sits a difference of 6.
You can manipulate one of the fractions to render the same denominator and work from there.
