Answer:
<em>There are 12 boys and 18 girls</em>
Step-by-step explanation:
<u>Equations</u>
There are 30 students in a class. Let's call:
x = number of boys
Since the sum of boys and girls is 30:
30 - x = number of girls
The ratio of boys to girls is 2:3, thus:

Crossing denominators:
3x = 2(30 - x)
Operating the parentheses:
3x = 60 - 2x
Adding 2x:
5x = 60
Dividing by 5:
x = 60/5 = 12
x = 12
There are 12 boys and 30-12=18 girls
Answer:
A
Step-by-step explanation:
Answer:
-5y
Step-by-step explanation:
A+a+4+2a-3= 21
combine like terms
1+4a= 21
-1. -1
4a= 20
————
4a. 4
a= 5
Answer:
C. The range of bagels
Step-by-step explanation: