Simplify: -81 + (14 – 23) + 12 • 9 a) -81 b) -18 c) 18 d) 22

Can someone answer this question? : )

Which of the following expressions is equal to 2x^2+8

Use complete sentences to differentiate between a regular tessellation, and a pure tessellation. be sure to include specific types of polygons in your explanation.