A 12% tin alloy is to be melted with an 18% tin alloy. How many kilograms of each tin alloy must be used to obtain 15 kilograms of an alloy that is 14% tin?

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319