A manatee surfaced for air 6 times in 240 seconds. How many seconds went by before the manatee surfaced the fourth time if it held its breath for the same rate?

What is 2x - 3y X 2x - 3y

The library carries a total of 750 biography, mystery, fantasy, and science fiction books. There are 3 times as many science fiction books as fantasy books, twice as many mystery books as fantasy books, and four times as many biographies as fantasy

57. How many positive integers satisfy the inequality x + 7 < 23? A. 15 B. 16 C. 17 D. 29 E. 30

Ana has been adding $30 to her saving account every month. Which model could represent the money in Ana's saving account (y) after x months

There are 17 animals in the barn. Some are ducks and some are sheep. There are 48 legs in all. How many of each animal arr there?

A class of 40 students took a math test. 18 of the students had a weighted average of 80. the other students had a weighted average of 70. what is the average score of the whole class?

Desiree ran 12 miles in 1 hr, 48 minutes, What was Desiree's average running rate, in minutes per mile

The table shows the heights and weights of a few students in a class. Height (inches) Weight (pounds) 58 122 59 128 60 126 62 133 63 145 64 136 66 144 68 150 70 152 Complete the following sentences based on your observations.

How much do you every 2 weeks if you make 21 an hour and work 42 hours?

Which of the following is a monomial? c^2 c 6 c^2 - 16 - 8c c^3 4c^2 - 12c 7