What is 0.0039 written in scientific notation?

Certain items are purchased jointly. If each person pays 8 coins, the surplus is 3 coins, and if each person gives 7 coins, the deficiency is 4 coins. Let x represent the number of people and y the number of coins needed to purchase the items.

Y+4*6x what does y =

Solve for x 4x-13=2x+9

In a rectangle, how do you determine what is length and what is width?

The product of two positive integers is 812 what is the value of of the lesser integer

Twelve college seniors were chosen at random and surveyed. The survey asked the participants for the number of hours they spent studying per week and their overall GPA.

A manufacturer finds it costs him x + 5x + 7 dollars to produce x tons of an item. At 2 production levels above 3 tons, he must hire additional workers, and his costs increase by 3 (x - 3) dollars on his total production.

What sets do - 51 belong too

33.8 divided by 32.5

What is the quotient of 2 1/4 divided by 5/8