Which system of equations models the problem if x represents the number of parrotfish jenna bought and y represents the number of triggerfish she bought?

jenna bought 280 tropical fish for a museum display. she bought 4 times as many triggerfish as parrotfish. how many of each type of fish did she buy?

a. {x+y=280
{y=4x

b.{x−y=280
{y=4x

c.{x+y=4
{y=280x

d.{x+4y=280
{y=4x

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:

What is the area of a pizza with a radius of 40 cm leave the answer in terms of π to find your exact answer 40π cm² 1600π cm² 800π cm² 80π cm² π=pi

Carl is hanging pictures in his home. there is a space on a wall that has a width of 4 feet. carl has pictures with different widths. which picture width would fit in the space on the wall? a. 46 inches b. 60 inches c. 50 inches d. 54 inches