When Devon cashed a $450 check at the bank, the teller gave him 18 bills, all $20 bills and $50 bills. Which system of equations can be used to find how many of each type of bill Devon received?

Find the volume of a sphere who's surface area is 154cm².

How many solutions does 4 (x-5) + 2=4x-18 have?

Solve for r:d=rR2/R2+R1

A tree casts a 13 foot shadow. the distance from the top of the tree to the far end of the shadow is 22 feet. if the tree is perfectly straight and creates a right angle with the ground, how tall is the tree?

6 ways to add 4,5 and 6

A Luxury of Furniture at a store sells couches for $4,000, Reclining Chairs for $2,040 and loveseats for $2,800. This Luxury line went on sale where the Price of each piece of Furniture was Divided by 4.

Consider the following linear programming problem: Max Z = $15x + $20y Subject to: 8x + 5y ≤ 40 0.4x + y ≥ 4 x, y ≥ 0 Determine the values for x and y that will maximize revenue.

7x-8y=11 8x-7y=7 solve using substitution

Rewrite - 8+2y=16in slope intercept form. What is the y intercept as an ordered pair?

Find the length of a rectangle which when cut in half has an area of 300 square inches and whose width is one-sixth of the length.