5x+13=-17 a teacher asked me to do this but she didn't explain how to do it i got to have the paper done by tomorrow

Plz hurry evaluate the expression a+b where a=8 and b=19

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy. how much will she pay after the discount

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false