A sheet metal shop ordered 60 lb of tin for 30 lb of a zinc alloy for a total cost of $480. A second purchase, at the same price, included 40 lb tin and 70 lb of zinc alloy. The total cost was $770. Find the total cost per pound of the tin and of the zinc alloy PLEASE EXPLAIN RESPONSE

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp