Mary brother is five years younger than 3 times her age. the sum of their ages 39. how old is mary

A pot of water is being heated up. The temperature of the water can be modeled by this equation with y representing the temperature, in degrees Fahrenheit, and x representing the time, in minutes, that the water has been on the stove. y = 9.5x + 62.

If a triangle has side lengths of 14 centimeters and 18 centimeters and the perimeter is 49 centimeters, how long is the third side?

What is the area of 8,2,5,4

Find the percent decrease for lakeside 51,300 and 45,800

Do these two expressions represent equivalent expressions Explain why or why not. 36 + 20 4 (9 + 5)

If (2a+3b) = 2 what is the value of (2a-3b)

The sale price for a bicycle is $315. The original price Was first discounted by 50% and then discounted an additional 10%. Find The original price of The bicycle.

Subtract 5/12 from 3/20

What is 2 16/99 as a decimal

A blimp travels 765 feet in 1/4 minute, 1,530 feet in 1/2, and 3,060 feet in 1 minute. Is there a proportional relationship between the distance the blimp travels and the time it travels? justify your answer.