Question

the rule for the number of fish in a home aquarium is 1 gallon of water for each 1 inch of fish length. Marta's aquarium 13 gallons and Hanks aquarium holds 17 gallons. Based on the number of fish they bought in exercise 10 ( Marta got 3 guppies & 2 planties; Hank got 3 guppies & 4 planties) How long is a guppy and how long is a planty?

Answer 1

ok so 1gallon=1

guppylegnth=g
plantielegnth=p

martha has 13 inches of fish
hank has 17 inchs of fish

the amount of fish is calculated by
amount of each fish times legnth of fish

martha:
13=3g+2p

hank:
17=3g+4p

compare, asssuming that all planties are same legnth and all guppies are same legnth

13=3g+2p
17=3g+4p
looks like we just added 2p to first euation to get secon equation

minus them
-13=-3g-2p
17=3g+4p +
4=0g+2p

4=2p
divide 2
2=p

sub back

13=3g+2p
13=3g+2(2)
13=3g+4
minus 4
9=3g
divide 3
3=g


guppies are 3 inches
planties are 2 inches
9

Answer 2

Answer:

guppylegnth=g

plantielegnth=p

martha has 13 inches of fish

hank has 17 inchs of fish

the amount of fish is calculated by

amount of each fish times legnth of fish

martha:

13=3g+2p

hank:

17=3g+4p

compare, asssuming that all planties are same legnth and all guppies are same legnth

13=3g+2p

17=3g+4p

looks like we just added 2p to first euation to get secon equation

minus them

-13=-3g-2p

17=3g+4p +

4=0g+2p

4=2p

divide 2

2=p

sub back

13=3g+2p

13=3g+2(2)

13=3g+4

minus 4

9=3g

divide 3

3=g

guppies are 3 inches

planties are 2 inches

9

Step-by-step explanation: