Why can't standard deviation be negative?

Which inequality shows how many rotations, r, she would have to run to meet her weekly goal

The product of six and the sum of a number and two had the same value as two less than the product of the same number and twenty

The rectangle below has an area of 70y^8+30y^6 The width of the rectangle is equal to the greatest common monomial factor of 70y^8 and 30y^6 What is the length and width of the rectangle?

If an investor wants to combine a 5/8 acre parcel with a 3.9 acre parcel, how big will the parcel be, expressed as a decimal?

Elinor determined that a triangle with side lengths 6, 10, and 8 does not form a right triangle. 62 + 102 = 82 36 + 100 = 64 136 ≠ 64 Is her answer correct?

Find a fraction that, when added to 3/8, gives a sum of 1. Show your work

Suppose there are three consecutive intergers. if two times the first is added to twice the middle, the results is 69 minus the largest number. what is the largest number?

In right triangle abc shown below what is the degree measure / _C

Compare 7⁄8 with 14⁄16 using (, = ).

Usable had 5 1/5 cups of flour. If she used 3 1/2 cups baking, how much flour does she have left?