The aquarium has 1 fewer red fish than blue fish. 60 percent of the fish are blue. how many blue fish are in the aquarium? show your work.

There are 3 blue fish in the aquarium.

Step-by-step explanation:

x = the number of red fish

y = the number of blue fish

x=y-1 is equation A

0.60(x+y)=y is equation B

substitute equation A in equation B and solve for y

0.60(y-1+y)=y

0.60(2y-1)=y

1.2y-0.60=y

1.2y-y=0.60

0.2y=0.60

y=3 blue fish

Find the value of x

x=y-1 is x=3-1=2 red fish

This means that there are 3 blue fish in the aquarium.

Step-by-step explanation:

2 red fish, 3 blue fish =5 fish total

20% for each fish, 20% x 5 =100%

2 red fish x 20%= 40%

3 blue fish x 20% =60%

answer is 3 blue fish

fabric (square meters)                   cloaks

7                                                           21

4/3                                                         4

step-by-step explanation:

we are told that harry needs 2 square meters of fabric for every 6 wizard cloaks he makes.

1. first of all we will find how many cloaks can be made from 1 square meter of fabric by dividing 6 by 2.

we can see that 3 cloaks can be made from 1 square meter of fabric. now we will multiply 3 by 7 to find number of cloaks made from 7 square meters of fabric.

therefore, harry will make 21 cloaks from 7 square meters of fabric.

2. let us find how many square meters of fabric will be needed to make 4 cloaks.

first of all we will find fabric needed for 1 cloak by dividing 2 by 6.

we can see that fabric needed for 1 cloak is   square meter. now we will multiply   by 4 to find fabric needed for 4 cloaks.

answer: the answer to this problem is 2x and 2-x both have x as well as 2

step-by-step explanation: first you have to see what is the closest thing they have similar second you note it example 4x and 4+x they both have x and 4