Solve the equation.
1/ 10 (x + 188) = −2(2 − x)
x =

−4(4 − x) = 4/5 (x + 16)
x =

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

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

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).