The exact value of cos 5pi/12 is:

A) 0.99

B) 0.26

C) sqrt2 (sqrt3-1) / 4

D) sqrt2 (sqrt3+1) / 4

True or false? it's not possible to build a triangle with side lengths of 7, 6, and 9

What is 2a+6b+2a+3b=

The perimeter of a trapezoid is 39a - 7. Three sides have the following lengths: 9a, 5a + 1, and 17a - 6. What is the length of the fourth side? A. 12 B. a - 7 C. 8a - 2 D. 31a - 5

Nikki bought a bag of jelly beans. she divided the jelly beans equally among herself and three friends. each person recived 23 jelly beans. how many jelly beans, j, were in the bag

Volume is the: Select the correct answer below: 1. basic unit for measuring distance 2. amount of matter in an object force per unit 3. area space occupied by any sample of matter

five whole numbers are written in order (4, 6, x, y, 10). The mean and median of the five numbers are the same. Work out the values of x and y.

What figures can be drawn in a circle with 2 perpendicular diameters?

Outside temperature over a day can be modeled as a sinusoidal function. Suppose you know the temperature varies between 67 and 83 degrees during the day and the average daily temperature first occurs at 8 AM.

What is decimal expansion?

What is 3U squared Variables and expressions