The swimming pool is open 7 1/2 hours a day. One lifeguard is on duty at a time, each working a 1 1/2 hour shift. How many lifeguards are needed per day?

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

In the diagram, gef and hef are congruent. what is the value of x

Which of the following parabolas opens down?