Given a mean of 61.2 and a standard deviation of 21.4, within how many standard deviations of the mean do the values 45,78,62,90, and 31 fall?

a. 0

b. 1

c. 2

d. 3

Use slopes and y-intercepts to determine if the lines y=5x+5 and 5x-y=-5 are parallel.

what is the length and width of a parallelogram that is 60 meters and the width is 2 meters less than the length

Which expression is equivalent 3/4 (3x-5)

An art teacher has 1 1/2 pounds of red clay and 3/4 pound of yellow clay. The teacher mixes the red and yellow clay. Each student in the class needs 1/8 pound of the clay. How many students can get enough clay?

A rectangular garden measures 40 yards by 35 yards. a lawn of uniform width surrounds the garden and has an area of 316 square yards. find the width of the lawn that surrounds the garden.

I am currently learning Complex Numbers, and I know nothing. so any info on this?

Rue or false? using the regression equation to make predictions for values of the predictor variable outside the range of the observed values of the predictor variable is risky and unreliable.

4 (x+1) - 7 = 3 (x-1) + x

Ben is sailing on a ship. The ship goes 600 miles north and then turn west. It travels 200 miles west and turns sought for 450 miles. It turns west again and travels 170 miles and turns south once more and travels 150 miles.

The volume of a tissue box is 288in3. If the box has a width of 6 inches and it is 4 inches high, how long is the box?