Simplify the expression - 9a - 6(a + 6)
a.
a . 3a + 36
b. 12a + 36
c. 3a - 36
d. 12a - 36

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

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