Question

Helena uses a mixture of compost and topsoil in her garden. She purchased a total of 10 cubic yards of compost and topsoil for $180. If compost costs $25 per cubic yard and topsoil costs $15 per cubic yard, how many cubic yards of topsoil did she purchase

Answer 1

compost note x and topsoil note y

x + y = 10 and

25x + 15y = 180

solve this system for x and y and in this way will get easy the correct answer

hope helped understandably