Which ordered pair is the solution to the system of equations?

{x+y=-1

{3x-y=21

A. (5.5, - 6.5)

B. (7, - 8)

C. (10, - 11)

D. (5, - 6)

Which figure has exacly 2 sets of parallel sides and no perpendicular sides A) rectangle B) hexagon C) square

The following regular polygon has 15 sides. This distance from its center to any given vertex is 12 inches. Which of the following is the best approximation for its perimeter?

72y^5 + 18y^2 what is the GCF? or is this prime?

A bag contains 1 red, 1 yellow, 1 blue, and 1 green marble. What is the probability of choosing a green marble, not replacing it, and then choosing a red marble?

Find the values of l and m that make each equation true (7+m) + (4l-10) i=3 - 6i

For an arithmetic sequence where a1 = 13 and the common difference is 3, find s7. A. 162 B. 151 C. 157 D. 154

Evaluate the following expressions For x=33 288-4x

Name the largest angle in triangle DEF given the perimeters equals 72ft sides are 24 ft and 21ft

A triangle has sides with lengths of 5x-7,3x-4 and 2x-6. What is the perimeter of the triangle?

1. How does price change perception? A. if people are told the price was high, they thought the product was better B. if people were told the price was low, they thought the product was better C.