Insert one pair of bracket to make this calculation correct .
7 - 5 - 3 + 4 = 9

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

True or false? a circle could be circumscribed about the quadrilateral below.

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers