50% of a certain number is 23. What is the number?

If your car gets 35 miles per gallon, how much does it cost to drive 450 miles when gasoline costs $2.90 per gallon?

Ethan practices the drum every 2nd day and the guitar every 7th day Ethan practiced the drum and guitar today determined the number of days until Ethan practices both instruments on the same day again

a company that makes hair-care products had 3000 people try a new shampoo. Of the 3000 people, 9 had a mild allergic reaction. What percent of people had a mild allergic reaction?

The most expensive type of life insurance

A=2 b=3 c=4 1) ab - c = 2) 6c - 2b= 3) a + b - c + 5 = 4) 7c - 2a =

David is standing 5000 feet away from the base of a cell phone tower. The angel of elevation from his eyes to the top of the tower is 78 degrees. If David's eyes are 6 feet above the ground how y'all is the tower?

Interquartile range definition

The y-intercept of the line whose equation is 7x - 4y=8 is

The population, y, of a small town can be represented using a quadratic model. The maximum population, 6,000 people, occurred 20 years after record keeping began. Five years later, the population was 5,950.

The chess club has 18 students. How many different teams of 4 can be formed for competition?