What is the negative square root of 81?

A greek proffesser who contributed 5 theroes of element to geometry

Company A charges $17.00, plus $11.00 per day to rent a piece of equipment company B charges $33.00, plus $9.00 per day to rent a piece of equipment how many must the piece of equipment be rented for the cost to be the same at both company's?

Find the intersection of the three sets: A = {-9, 0, 5}, B = {0, 2, 5, 8}, C = {-9, 2, 5}.

Write - 2x 2 (-5x 2 + 4x 3) in standard form

The height of a right cylinder is 2r, where r is the radius. Write a function f in simplest form that represents the ratio of the surface area to the volume.

There are 5,280 feet in one mile how many feet are in 143 miles?

At the city museum, child admission is $5.40 and adult admission is $8.70. On Friday, 170 tickets were sold for a total sales of $1224.90. How many adult tickets were sold that day?

Becky spent 2/3 of her piano practice time on her recital piece. If she spent 25 min. on other pieces how many hours did Becky spend practicing

8sin (0.3x - 3) + 74,

What is the slope and y-intercept of the linear equation y = 5x - 4? M = ? B = ?