OpenStudy (anonymous):

the manager of a music store ordered 20 new violins. she ordered some of two different models- the standard and the deluxe. each standard violin costs $500, and each deluxe violin costs$800 if the manager spent exactly \$11,500 on these violins how many deluxe violins did she order? show your work or explain how you know.. for my equation i set it up like this: 500s + 800d = 11,500 s + d = 20 not sure what to do next..

5 years ago
OpenStudy (anonymous):

Rearrage the second equation for s = ... or d = ... then substitute it into the 1st equation :)

5 years ago
OpenStudy (anonymous):

then solve for that variable. Once you have one, you can get the other

5 years ago
OpenStudy (anonymous):

Solve for the two equations by substitution: 500s + 800(20-s)=11500

5 years ago
OpenStudy (anonymous):

i think we have to use distribution

5 years ago
OpenStudy (anonymous):

You can solve it using this method and it's simple.

5 years ago
OpenStudy (anonymous):