What is the mean of this

15, 16, 15, 13, 19, 20, 21

what is the answer?

A: 15

B: 16

C: 17

D: 18

Jenny is building a rectangular garden around a tree in her yard. The southwest corner of the garden will be 2 feet south and 3 feet west of the tree. The northwest corner of the garden is 1 foot north and 4 feet east of the tree.

A bag has 11 red marbles and 4 yellow marbles. Half of the yellow marbles are made of plastic. A marble is selected at random from the bag. What is the probability that it is a yellow, plastic marble? Write your answer as a fraction in simplest form.

Two fractions has the same numerator but different denominators fraction is greater

A circle has a radius of 4. An arc in this circle has a central angle of 288 degrees. What is the length of the arc?

Combine Like Terms - (x + 3) - (x - 4)

Vf²=vi² + 2ad A) solve for vi B) solve for d Using the same equation

Describe how to transform the graph of f into the graph of g. f (x) = x6 and g (x) = - x6 Reflect the graph of f across the x-axis. Reflect the graph of f across the y-axis. Shift the graph of f down 1 unit.

A triangle's height is 10 feet more than its base. If the area of the triangle is 100 square feet, use factoring to find its dimensions.

A semi-truck trailer is basically a rectangular prism. A typical height for the inside of these trailers is 108 inches. If the trailer is 8 feet wide and 20 feet long, what is the volume of the trailer

Selecting a red pen and then a blue pen, when selecting 2 pens from a bag of 10 red pens