The ratio of adults to children is 8:5 of 390 people

6*x^2+4 (x^2-1) How do you combine this equation into like terms (^number stands for exponents)

If a rectangles length is 3 more than 2 times the width and the perimeter is 24. what are the dimensions of the rectangles?

A student is reading a book at 350 word per minute convert this to word per hour

By what factor would you need to multiply the first and second equations to eliminate x? By what factor would you need to multiply the second and third equations to eliminate x?

Solve for w. w/4 - 5 = 4

12.5 - 4g = - 2g - 3.5

A "Local" train leaves a station and runs at an average rate of 35 mph. An hour and a half later an "Express" train leaves the station and travels at an average rate of 56 mph on a parallel track.

The length of a rectangular poster is 28 inches. The area is 1316 square inches. What is the width?

Six more than the quotient of a number and 9 equals 2

The fixed expenses are what percent of mary's income?