Each serving of a cereal is 80 calories. Which expression can be used to find the number of calories in 3 servings? 80 times 3
80 divided by 3
3 divided by 80
80 minus 3

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21

Pleas its really urgent and i would really appreciate it! what is the value of x? enter your answer in the box. x =

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?