A metalworker has a metal alloy that is 20 % copper and another alloy that is 65 % copper. How many kilograms of each alloy should the metalworker combine to create 120 kg of a 47 % copper alloy?

I have 120 marbles that I need to share with iris, Jesse, and Jaime in the ratio of 1:3:4 respectively calculate how much Jesse received? how much iris received?

What is the balance after 1 year of an account containing $1400 which is kept in an account that has a yearly nominal interest rate of 11% and is compounded a). annually? b). weekly? c). every minute? d). continuously?

Which of the following verbal expressions represents the algebraic expression 2x - 8? A. eight less than twice a number B. the difference between eight and twice a number C. twice eight less than a number D. twice a number and eight

Last year there were 1,435 8 grade students enrolled at your school. This year there are 1220 ... What is the percent change in the number of 8th grade?

Necesito ayuda con esto add using partial sums

Solve by graphing y = - 4x+5 y=3x-2

What are some answers to what equals 19

17t + 4t - 5t - 13t = 18

6x-2y=10 for y when x=2

Name each polynomial by degree and number of terms. Which is the leading coefficient? 10n+1