(X1+X2/2). (Y1 + Y2/2) what is this equation called. its 16 letters long plz help need for 10th grade semester finals.

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong

An internet company charges $8.95 per month for the first 3 months that it hosts your web site. then the company charges $11.95 per month for web hosting. how much money, in dollars, will the company charge for 8 months of web hosting?

Which best explains why this triangle is or is not a right triangle ?