Answer:
a. A quadratic can only have one y-intercept.
Step-by-step explanation:
Part A
The number of walking planks is given by the series
5, 9, 13, ...,
This is an arithmetic series with
a = 5, the first term
d = 4, the common difference
On the n-th day, the number of walking planks is

Answer:

Part B
On the 12-th day, the number of walking planks is

Answer: A. 49
Step-by-step explanation:
3y means 3 times y. It is normally used to shorten an equation with a variable to save room. The number is always placed before the variable.
Answer:
Diego ran faster
Step-by-step explanation:
In the ten seconds, Diego ran 15 meters faster than Lin.
55 - 40 = 15