The variable x represents the number of angelfish carlos bought and the variable y represents the number of parrotfish he bought.
carlos bought 405 tropical fish for a museum display. he bought 8 times as many parrotfish as angelfish.
how many of each type of fish did he buy?
which system of equations models this problem?
{x+y=405
y=8x
{x−y=405
y=8x
{x+4y=8
y=405x
{x+y=8
y=405x

Find the solutions for a triangle with a =16, c =12, and b = 63º

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

Fa bus driver leaves her first stop by 7: 00 a. m., her route will take less than 37 minutes. if she leaves after 7: 00 a. m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?