Simplify\:\sqrt[3]{27x^{15}}y^{24}

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?