What is the contrapositive to this statement?

vertical angels are two nonadjacent angles formed by two intersecting lines.

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?