The average heartbeat rate for persons 12 to 16 years old is 80 beats per minute at rest. at this rate how many times does the heart beat in two and a half hours?

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?

Ebert used to make $22 an hour, but got a 10% raise. how much more will he make in a 40 hour work week with raise?