-7x+y=-19
8x-8y=8
What is the answer

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.