Ametalworker has a metal alloy that is 15% copper and another alloy that is
75% copper. how many kilograms of each alloy should the metalworker combine to create 120 kg of a 51% copper alloy?

how do i set up this equation?

Solve the equation by completing the square. x^2+2x=17

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2