A metalworker has a metal alloy that is 15% copper and another alloy that is 75% copper. How many kilograms of each alloy should the metal worker combine to create 90 kilograms of a 51% copper alloy?

What is y+7/7y:3y^2+21y/14y-5 simplified?

On Friday Alexis bought 7 T shirt for 18 each she also bought 4 sports caps for 14 each and a pair of shoes for 26. How much money did Alexis spend on Friday?

Two cars start from two towns 400 miles apart and travel towards each other. They pass each other after 4 hours. find the speed of each car if the difference between their speeds is 20 miles per hour.

There are 16 students playing kickball. Two students leave to go play hopscotch. How do you write the fraction of children left on the kickball field in lowest terms.

Luna is using a can of metal open take him up to every time sheet with the name of the can opener that can turn 36 how many times does Luna have to twist the name of the can't open it to make the turn in the full circle

If the range of f (x) = square root mx and the range of g (x) = m square root x are the same, which statement is true about the value of m?

What are the next two terms after 1/8,2/7,3/6,4/5, ... ? And inductive reasoning for it

Steve has $360 in a savings account in the bank. He runs 3% interest each month how much interest would he earn in one month

What is expanded form for 4,984,442

What is the missing value in the equation? 4 2/6 - 3/n = 4 17/24