Answer: 32.5a + 20.47b
Step-by-step explanation:
11 blue
2 green
7 brown
total is 20 card
7 out of that 20 are brown
so x out of 100% are brown
7/20=x/100 - cross multiply
700=20x
x=700/20
x=70/2
Answer:
36 questions were correct.
Step-by-step explanation:
In order to find how many questions correct, you have to multiply it :

40-15=25 students not on student council
25/40 = .625 decimal
multiply by 100 to get percent
62.5% of students are not on student council
Estimating:
15 rounds to 20 and 40 rounds to 50
40% are in student council and that leaves roughly 60% not in student council.
Answer:
I'm just guessing but I'm 1000000000%sure out of 10000000000000000000000000000