David purchased some cookies at the cost of 5 for $4 and sold 4 for $5. He made a profit of $90. How many cookies did he purchase and sell to make that much money

Which system of equations could be graphed to solve the equation below? log Subscript 0.5 Baseline x = log Subscript 3 Baseline 2 + x y 1 = StartFraction log 0.

How tall would the building be if it had 15 floors?

Four times a number is 21 more than the number. What is the number?

What type of problem is 4x+1=2x+7

The perimeter of a square garden is 52 feet. what is the length of each side?

What is the variance of the values 8,10,14,12?

Simplify the expression. 3 (x 3) - 2x 4

Suppose that $2000 is loaned at a rate of 15.5%, compounded semiannually. Assuming that no payments are made, find the amount owed after 9 years. Do not round any intermediate computations, and round your answer to the nearest cent

Sam bought 2 3/4 pounds of shrimp and 2 1/2 pounds of crabmeat. How much seafood did he buy?

Gerald is an electrician. He charges a callout fee of $100 and charges $80/hr. Represent the cost of hiring Gerald for h hours using an algebraic expression.