The local park has 4 bike racks. Each bike rack can hold 15 bikes. There are 16 bikes on the bike racks. What expression shows the total number of empty spaces in the bike racks?

(hurry! ) which expression is equivalent to the following complex fraction?

Me! #1 write an equation for the interior angles of this triangle that uses the triangle sum theorem. #2 what is the value of x? #3 what is the measure of #4 classify the triangle above as acute, obtuse, or right. state your reason in a complete sentence.

What signals you that factoring by grouping is the best method to use when factoring a problem?