Models proving that 3 (a+b) is equivalent to 3a+3b

What is the answer of Three over Four multiply to eight over nine?

75000 live bacteria present in a culture in a flask. When antibiotic is added to the culture, the number of live bacteria is reduced by half every four hours. Approximately how many hours have passed when there are 1500 bacteria left alive? A. 22.

If the shadow of tree is 15 meters long and the shadow of a person who is 1.6 meters tall is 3 meters long, then how tall is the tree

A store had a vending machine. Customers put in a quarter, and they receive a handful of candy. The machine is profitable if x > 40, where x is the total amount of money in quarters at the end of one week.

What is the quotient 6-9i/-8+3i

What is the mean absolute deviation for the data set 10, 20, 5, 5?

Which of the following is true regarding the sequence below? 7/12, 1/6, - 1/4, 2/3 A. The sequence is arithmetic because there is a common difference of - 5/12 B. The sequence is arithmetic because there is a common difference of 1. C.

On Friday a local hamburger shop sold a combined total of 564 hamburgers and cheeseburgers. The number of cheeseburgers sold was three times the number of hamburgers sold. How many hamburgers were sold?

Write 0.126126126 ... as a fraction

Lori has 60% of the book to read. If she has read 120 pages how many pages does she still have to read