Which expression is equivalent to m 2 - 13 m -30?

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

Ashop has a sale that offers 20% off all prices. on the final day they reduce all the sale prices by 25% linz buys a ratio on the day. work out the overall percentage reduction on the price of the ratio