Answer:
Markup amount = sellingprice - costprice
=12.50 - 5 = 7.5 is markup
A = hb/2
A = (15)(11) / 2
A = 165/2
A = 82.5 <===
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:
1/4
Step-by-step explanation:
3/4 + 1/4 = 4/4
Answer:
5n+5
Step-by-step explanation:
5(n+3)-10
5n+15-10
5n+5