What is the image of the point (-9,-1) after a rotation of 270 degrees counterclockwise about the origin?

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

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

Prove the following(cot0+cosec0)[tex](cot0 + cosec0) { }^{2} = \frac{1 + cos0}{1 - cos0} [/tex]