Answer:
the 1st one. the unit rate is $21.00
Answer: 28
Step-by-step explanation:
7 days of per week. Two times a day. Two minutes. 14 times per week, two minutes every time. 28 minutes per week.
How to solve these type of problems:
1. simplify
2. divide the powers when needed
3. multiply the powers when needed
4. a^-1 = 1/a
hope it helps
Answer:
48 students in the class
Step-by-step explanation:
The ratio of girls to boys is 3 : 5 = 3x : 5x ( x is a multiplier ) , then
5x = 3x + 12 ( 12 more boys than girls )
Subtract 3x from both sides )
2x = 12 ( divide both sides by 2 )
x = 6
Then
number of girls = 3x = 3 × 6 = 18
number of boys = 5x = 5 × 6 = 30
total students in class = 18 + 30 = 48