Answer:

Step-by-step explanation:
we know that
Using proportion

Step-by-step explanation:
since there are z fishes
the number of angelfish = <u>1</u><u> </u> × z
4
= <u>1</u><u> </u>z
4
120
Step by step explanation:
Divide 1200 by 10
That equals 120
You can back check by multiplying 120 by 10
Answer: The b-value is the middle number, the number next to the x. The other letters, a and c, are also numbers like b. Each of these can be any number. In combination, they tell you what the quadratic function will look like when graphed