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

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

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44

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the

should have been evaluated with one odd value and one even value. the expressions have equivalent values when . when , the first expression has a value of 3 and the second

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at each of the parallel lines adjacent angles are supplementary. the angles have special names identifying their positions with respect to the parallel lines and transversal. they are corresponding angles, alternate interior angles, or alternate exterior angles. an angles is congruent to its matched angle.