A whale starts at -9 m and changes 11 m?

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

Which best explains why this triangle is or is not a right triangle ?

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad