Create a factor tree for 21

The sum of 10 and a number is 3 times the number. 10 3n = n 10 n = 3 n 10 n = 3n 10 (n 3) = n

Solve. 24=7/8g A. 3/7 B. 21 C. 23 1/8 D. 27 3/7

The average of 1/5 and other two numbers out of which one is the half of the other is 1/4. The smallest fraction out of unknowns is: a) 1/6 b) 11/60 c) 1 1/30 d) 1/2 e) 9/20

Jeff hikes 1/2 mile every 15 minutes, or 1/4 hour. Lisa hikes 1/3 miles every 10 minutes, or 1/6 hour. How far do they each hike in 1 hour?2 hour?

A function, f (x), represents the distance, in miles, that sarah drives each hour, x. Select the appropriate domain for this situation. A. The set of all positive integers. B. The set of all real numbers. C.

A librarian has weekend off and has 10 paid vacation days per year

A country's population in 1990 was 132 million. In 1998 it was 137 million. Estimate the population in 2003 using the exponential growth formula. Round your answer to the nearest million.

Simplify 7x + 2y - 3x - 5y

The staircase has treads that are 10 inches deep with 7 inch high risers. If the staircase needs to reach a total height of 8 feet, 2 inches. How much floor space needs to be allowed for the staircase?

During one month of cell phone use, Noah used 200 anytime minutes and 400 text messages, and paid $80. the next month, he used 150 anytime minutes and 350 text messages, and paid $67.50.