Which system of equations would represent the scenario below? Amahle is making a 22 pounds of a steel alloy that needs to be 13% magnesium. She has a steel alloy A that contains 21% magnesium and another steel alloy B that contains 9% magnesium. How many pounds of each steel alloy does she need to mix? Let x = pounds of steel alloy A Let y = pounds of steel alloy B

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?

Collin did the work to see if 10 is a solution to the equation r/4=2.4

$5400 is? invested, part of it at 11? % and part of it at 8? %. for a certain? year, the total yield is ? $522.00. how much was invested at each? rate?