Answer:
88 problems
Step-by-step explanation:
Set this problem up as fractions
86/x = 98/100
Cross multiply
86 × 100 = x × 98
8600 = 98x
Divide both sides by 98
87.75... = x
Round to nearest whole number
87.75 rounds up to 88
88 problems
We have the following:

solving for x

The solution of x is equal to 28, therefore 12 is not a solution of the equation
Answer:
$9.36
Step-by-step explanation:
First 12.5 - 5.3 = 7.2
7.2 x 1.30 = 9.36
Answer:

Step-by-step explanation:
We translate the phrase into an equation:

Then we simplify:

Answer:
It the first one
Step-by-step explanation: