How is 35 to 10 proportional to 7 to 5

In Lucille's class, 35% of the students have blond hair. There are 20 students in the class. How many students have blond hair.

Factor completely. x^2+4x-12

The tens digit is two less than the units digit. If the digits are reversed, the sum of the reversed number and the original number is 154. Find the original number.

Suppose you buy a CD for $250 that earns 3% APR and is compounded quarterly. The CD matures in 5 years, assume that is funds are withdrawn before the CD matures. The early withdrawal fee is 3 months interest.

Paul is four times as old as his brother. In six years time Paul will be eighteen. How old will his brother be in six years time?

What is the probability of not rolling factors of 3 on both dice

How many times greater is the value represented by the digit 3 in 437,291 than the value represented by the digit 3 in 583,426?

Max practices the piano in the guitar for a total of 150 minutes every day he practices guitar 80 minutes more than he practices the piano how much time does Max been practicing the piano every day

What number is 10 times greater than 5?

A parallelogram has one angle that measures 55°. What are the measures of the other three angles in the parallelogram?