Mia is counting pond life animals.In two hours she counted 4 more frogs then turtles.The number of crayfish she counted was 3 more than twice the number of turtles.She counted 75 pond animals all together.How much of each did she count.
P.S. first person to give the right answers gets 10 pts.
2007-09-26 14:58:16 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
17 turtles
21 frogs
37 crayfish
2007-09-26 15:12:51 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Establish variables:
T = # of turtles counted
F = # of frogs counted
C = # of crayfish counted
You have 3 unknowns, so you need 3 equations to solve....
1. F = T + 4
2. C = 2T+ 3
3. T + F + C = 75
Get 3rd eqn. in terms of 1 variable (in this case, t) and solve:
T + (T + 4) + (2T + 3) = 75
4T + 7 = 75
4T = 68
T = 17 turtles
F = 21 frogs
C = 37 crayfish
2007-09-26 22:24:30 · answer #2 · answered by The K-Factor 3 · 1⤊ 0⤋
There are 17 turtles.
21 frogs.
37 crayfish.
Hope that helps.
2007-09-26 22:13:12 · answer #3 · answered by Tesline T 2 · 0⤊ 0⤋