Convert 21/15 to a mixed number and reduce the fraction

How do you know when to use the addition property of a equality?

Find surface area of a circular solid. A sphere with d = 10.4 yd

What's 10067384+92737384

For each handmade card Jacquie sells, she makes a profit of $0.35. In one week she made a profit of $42. she sells the cards for $0.

What is the value of 3*2+4y2 if x=2, y=1, and z=-3

The hourly wage for an employee is $11.5 per hour. The employee also earns 80 cents for each item they manufacture during the workday.

A political discussion group consist of five democrats and six republicans four people are selected to attend the conference in how many ways can four people be selected from this group

20,30,40,50,60,70,80 the mean of the number set is

Rewrite the function by completing the square r^2+18x+80=0

8,669 - (4,398 + 571) is this an equation