If elephant grass grows 3 1/2 inches a day, how many inches will it grow in 7 days?

How to determine whether two known pairs of points are on the same line.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.