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?

Question

Nnesha · Answer

let x= compost yard
y=topsoil yard
compost price is $25 per cubic yard
topsoil price is $15 per cubic yard 
total  = $180
so one of the equation will be 25x+15y=180

Nnesha · Answer

That equation represents the price. Given that she purchases a total of 10 cubic yard, we need another equation  x+y=10

Nnesha · Answer

**x and y represents the  number of cubic yards 
Do you how to solve the system of equations?