Answer:
it should be 2 units
Step-by-step explanation:
So first create and define your variables:
Z = amount of zebra fish
N = amount of neon tetras
Now create your equations:
2z+2.15n=31.20
z+n=15
This is your system. There are multiple methods to use but in this problem I’ll use the substitution method by simplifying the bottom equation.
2z+2.15n=31.20
z=15-n
Now I’ll plug the bottom equation into the top one.
2(15-n)+2.15n=31.20
And just solve from here.
30-2n+2.15n=31.20
0.15n=1.20
n=8
So he bout 8 neon tetras, and 15-8= 7, so he bought 7 zebra fish
Answer: L, J, K
Step-by-step explanation:
L, J, and K are collinear because they all lie on the same line.
Answer:
4
Step-by-step explanation:
2 plus 2 equals 4 lmk if you need more help
Answer: 
a=-3
b=-9
Step-by-step explanation:
