A metalworker has a metal alloy that is 20 % copper and another alloy that is 75 % copper. How many kilograms of each alloy should the metalworker combine to create 80 kg of a 53 % copper alloy?

What's an expression that's equivalent to 3+2 (5x) - 7?

The principal on Jan's loan was $4,700, but by the time she had paid it off after four years, the interest and principal totaled $5,388.

If 1500 is deposited in an account that pays 4% interest, what is the difference in the amount after 3 years between the amount earned if the principal is compounded annually and the account earned calculated using simple interest

What can you conclude about the interior angles formed when two parrallel lines are cut by a transversal

American football fields measure 100 yards long between the end zones, and are 53 1/3 yards wide. Is the length of the diagonal across this field more or less than 120 yards? Explain.

2x+7-5x+8=3 (5+6x) - 12x

How to write 1,010,101.101 in expanded form

Tom is hiking on a trail that lies on a railroad track. The total length of the trail is 5.4 kilometers. Starting from the beginning of the trail, he has been walking for 45 minutes at an average speed of 2.4 kilometers per hour.

A rocket is launched from the top of a 90 foot cliff with an initial velocity of 140 feet per second. The height, h, of the rocket after t seconds is given by the equati

4. Thirty divided by seven times a number A. 30 + 7n B. in 30 30 (7n) None of the above 30:7.