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:A
Step-by-step explanation:
Answer
the answer is 8 so your welcome
Answer:
a=72° b = 6°
Step-by-step explanation:
answer is in pic
Answer:
- 3x³-6x²
- 3x²+x-2
- -16
Step-by-step explanation:
For 1: Multiply both functions together, expand, then simplify
(x-2)(3x²) = 3x³-6x²
For 2: Just add both functions together
For 3: Subtract both functions to get -3x²+x-2 and substitute x with -2
-3(-2)²-2-2 = -16