A metalworker has a metal alloy that is 20 % copper and another alloy that is 60 % copper. How many kilograms of each alloy should the metalworker combine to create 90 kg of a 52 % copper alloy?

How to figure out slope intercept form but its all mixed up like this for example y - 3x = 19

Sharon, Mark, Beverly and Bruce each work as a doctor, lawyer, teacher or farmer. From the clues below, decide who is the farmer? 1. Mark is not a teacher or a farmer. 2. Beverly is either a teacher or a doctor. 3. Bruce is not a lawyer or a farmer.

The table shows the number of hours that a grouped of students spent studying for the SAT during their first week of preparation. The students each add 4 hours to their study times in the second week.

Kail Ryans 10 laps around the track each day each lap around the track is 400 m meters how many times around the track will she need to run a total of 12 kilometers

Will it be better to use 20% off ten 20$

How to i make this number sentence correct with adding parenthesis? 4² + (-3) - (-5) * 2 = 20

Are the ratios 5:15 and 1:3 equivalent

Find a rational number halfway in between the two numbers 7/8 and 2/7

Bag a contains 7x counters bag b contains 2x counters Five counters are taken from bag a and put in bag b

Angela and Doreen each want to buy the same comb. Angela still needs 58 cents to buy a comb and Doreen still needs 6 cents. If they want to combine their money, they still do not have enough. What is the most the comb could cost?