8/21 Marks
A shop has a sale that offers 20% off all prices.
On the final day they reduce all the sale prices by 25%.
Linz buys a radio on the final day.
Work out the overall percentage reduction on the price of the radio.

What is the vertex form of f(x) = x2 + 6x + 3

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.