Mary and Sam need to plant 198 trees. If Mary can plant 12 trees in 5 hours and Sam can plant 14 trees in 7 hours
how long would it take them if they worked together?

steps ?

Abox of chocolates costs $7. which equation relates the number of boxes sold (x) and total cost of the boxes sold (y)?

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180