A metal alloy is 25% copper. Another metal alloy is 50% copper. How many grams of the 50% copper alloy should be used to make 1000 grams of a metal alloy that is 45% copper?

Angle A and angle B are complementary. The measure of angle A is five less than four times the measure of angle B. Find the measure of the smaller angle

As part of a screening process, computer chips must be operated in an oven at 125 °C. At the end of the cycle, the oven must be cooled before the chips can be removed. Ten minutes after starting cool-down, the temperature is 66 °C.

What are solutions to the equation below x^2 + 3x-18=0

Which of the following questions represents this equation? m + 13 = 21 What number when increased by 21 is equal to 13? What number when subtracted from 13 is equal to 21? The sum of what number and 13 is equal to 21?

Lily paid her parents $250 for rent and divided the rest of her paycheck evenly into a checking account, a savings account, and a retirement fund. She put $238 into her savings account. Write and equation to represent this situation.

Solve to following equation for x: 6 (4x + 5) = 3 (x + 8) + 3

A doctor has 6 patients to visit. How many different ways can he make his rounds if he checks each patient once?

5 friends went out for lunch. their total bill was $41.25, including tax and gratuity. one of them ordered only soda and needed to pay only $2.17. the other 4 friends ordered the same daily special.

What does 2/3 + 4/5 equal?

Find the next two terms in the sequence. 9.8, 0.7, - 8.4, - 17.5, ... -35, - 70 -26.6, - 35.7 26.6, 35.7 18.9, 28 Find the exact value of the eighth term of the geometric sequence: 648, 216, 72, 24 ... .