There are two factors of -36 such that one factor is 11 less than half of the other factor. Choose all the pairs of these factors.
-2 and 18
-6 and 6
3 and -12
4 and -9

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.

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Can someone tell me if this is perpendicular? !