Which system of equations models the problem if x represents the number of angelfish yves bought and y represents the number of parrot fish he bought?

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

a. ( x + y +420 y= 6 x)
b. ( x- y= 420 y= 6x)
c. x + 6y= 420 y= 6x)
d. x + y = 6 y= 420x)

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A.

Step-by-step explanation:

So, 420 is the total number of fish caught in all, and "6 times as much" is represented by

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answer: the dogs need to shift their focus to human scent.

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answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.