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

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.