How many students spent at least six hours of homework per week

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 15 subjects had a mean wake time of 100.0 min. After treatment, the 15 subjects had a mean wake time of 92.

Does the equation 2x-4y=0 represent a direct variation

Bradley goes to a fast food restaurant and orders some tacos and burritos. He sees on the nutrition menu that tacos are 140 calories and burritos are 430 calories.

How to solve - 13=5 (1 4m) - 2m?

You are making a welding fixture and must cut down a length of steel tubing from 19 3/8 inches to 11 9/16 inches. When you cut the tubing, you will waste 1/16 inch of it because of the width of the saw cut.

Probability: There are 11 shirts in your closet, 6 blue and 5 green. You randomly select one to wear on Monday and then a different one on Tuesday. You wear blue shirts both days.

If a is a nonnegative real number, then which inequality statement best describes a?

Which equation has the steepest graph? A. Y = 7x + 3 B. Y = 8x - 1 C. Y = - 10x - 4 D. Y = - 2x + 6

in 1996 there were approximately 275 students in the Delaware high school band in 2002 that number increased to 305 find the annual rate of change in the number of students in the band?

What is the value of 4 to the power of - 3