Twenty percent of what number is equal to five percent of 680

Two trains left the station at the same time, one heading due east at 40 miles per hour and the other heading due west at 50 miles per hour. How far apart were they after 4 hours? A. 160 B. 200 C. 360 D. 400

Evaluate the expression. 9!/3!

The coordinates R (1, - 3), S (3, - 1) T (5, - 7) form a right triangle. True False

4 (1 + 9x) i need assistance!

What is the y-intercept of the line represented by the equation y=7x+2

12 quarts - 8 cups = ? cups

A farmer planted corn in a square field. one side of the field measure 32 yards. what is the area of the cornfield? show your work.

Is 2^7 equal to 2 • 7? Explain.

Factor this expression completely and then place the factors in the proper location on the grid. x2 - 9

What are exponential functions