How many liters of a 90% acid solution must be added to 6 liters of a 15% acid solution to obtain a 40% acid solution?

Is 0.8 a rational or irrational number

Alexandra wants to sign up for cell phone service she trying to decide which company she should choose.

The ratio of yellow marbles to green marbles is 5 yellow marbles to 9 green marbles. If there are 18 green marbles, how many yellow marbles are there?

Divide (-7x+x^2+15) / (-3+x)

What is 4574/24 mean

Quinton brought 40 cupcakes to school on his birthday. He gave a cupcake to each of the 18 students in Ms. Delmonts class. He also gave a cupcake to each of the 16 students in Mrs Donnelly's class. He also gave a cupcake to Ms.

michael started a savings account and after 3 weeks, he had $500 dollars, and after 7 weeks, he had $900. What is the rate of change of money in his savings account per week?

Which property is illustrated by the following statement if ABC=DEF and DEF=XYZ then ABC=XYZ

10 increased by the quotient of a number and 2 is 13.

A website has 13,406. How do you to do it in Word form