After three exams, Jenny has a mean score of 74. With only one exam remaining in the class, what is the minimum score she will need on that exam to have an overall mean of 80?

In a 45-45-90 right triangle, what is the ratio of the length of one leg to the length of the other leg? а . 1: 2 в. 2: 1 с. 2: 1 d. 1: 1

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.