Dan has some marbles. Ellie has twice as many marbles as dan. frank has 15 marbles. Dan, Ellie and frank have a total of 63 marbles. How many does dan have

How to solve 7x2+5-2x-3+5

The sum of two numbers is 724. One number is 217. What is the other number?

Determine the effect on the balance sheet after the following transaction. You sell a product purchased for $500 for $1500. This means

A t-shirt increased in price by 14. After the increase it was priced at £30. What was the original price of the t-shirt?

A random sample has been taken from a population. A statistician, using this sample, needs to decide whether to construct a 90 percent confidence interval for the population mean or a 95 percent confidence interval for the population mean.

A=2x+6xz solve for x

Evaluate the expression when a=-3 and b=7 7a-b

Abby works at the library for 12 hours and makes 108.00 dollars. If p represents her hourly pay, write an equation that will calculate how much Abby made per hour

7y^4-19y^3-6y^2 factor the trinomial

one fourth of the 7th grade students made honor roll in the first quarter. the number of honor roll students increased by 18 in the second quarter. If 105 students made honor roll in the second quarter. How many total 7th graders are there?