The side lengths of two triangles are shown. Triangle 2
3x
Triangle 1
3x
6
2(5x – 14)
8
21-2x + 16)
Which of the following statements are true? Select all that apply.
A) The perimeter of Triangle 1 is x + 22.
B) The perimeter of Triangle 1 is - x + 38.
C) The perimeter of Triangle 2 is 13x – 20.
D) The perimeter of Triangle 2 is 8x - 6.

How can we find the measure of an exterior angle if we know the measurement of an interior angle

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. the diameter of the base of the cone is approximately three times the altitude. at what rate is the height of the pile changing when the pile is 12 feet high? (hint: the formula for the volume of a cone is v = 1 3 πr2h.)

The sum of two numbers is 86, and their difference is 20. find the two numbers