Yves bought 420 tropical fish for a museum display. he bought 6 times as many parrotfish as angelfish. how many of each type of fish did he buy?

which is a system of equations to model the problem if x represents the number of angelfish yves bought and y represents the number of parrotfish he bought?

a.
x + y = 6
y = 420x

b.
x + 6y = 420
y = 6x

c.
x – y = 420
y = 6x

d.
x + y = 420
y = 6x
you who ever dose and thi is all one question : )

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

The water company charges a residential customer $41 for the first 3,000 gallons of water used and $1 for every 200 gallons used over 3000 gallons. if the water bill was $58 how many gallons of water were usedanswersa 3400 gallonsb 6000 gallonsc 6400 gallons d 7000 gallons

As a project for math class, two students devised a game in which 3 black marbles and 2 red marbles are put into a bag. first the players must decide who is playing black marbles and who is playing red marbles. then each player takes a turn at drawing a marble, noting the color, replacing the marble in the bag, and then drawing a second marble and noting the color before returning it to the bag. the point scheme for the game is detailed in the table below. point values for marble game black marble points red marble points both black: +2 points both red: +4 points different colors: –1 point different colors: –1 point both red: 0 points both black: 0 points