3/7 of what number is 21?

The graph shows the number of copies a copier can make. What is the unit rate? A) 1 25 B) 5 C) 15 D) 25

What number when multiplied by itself is 23 greater than the preceding number when it is multiplied by itself?

Least to greatest 0.5, 0.05, 5/8

A rural mail carrier logged the mileage on the odometer at the start of the mail route as 31,500 miles. After 6.5 hours, the carrier returned the truck and recorded the mileage at 31,713 miles.

The sum of two numbers is 54. the smaller number is 12 less than the larger number. what are the numbers?

The sequence below is arithmetic {1,8,27,64}

Angles α and b are the two acute angles in a right triangle. Use the relationship between sine and cosine to find the value of b if b < α. sin (x 2 + 2x) = cos (2x + 3x 2)

Kevin has mowed 40% of the lawn. If he has been mowing for 20 minutes, how long will it take him to mow in a hour?

How to solve - x^2-2x=5?

Part A: Create a system of linear equations with no solution. In two or more complete sentences, explain the specific characteristics that you included in each equation to ensure that the system would not have a solution.