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? {x+4y=280y=4x {x−y=280y=4x {x+y=280y=4x {x+y=4y=280x

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2