The water levels at high tide was 9 feet and 1 foot at low tide
10x + 19y = -11
19y = -10x - 11
y = -10/19x - 11/19 <===
Answer:

Step-by-step explanation:
we know that
The compound interest formula is equal to
where
A is the amount that she will repay
P is the amount borrowed
r is the rate of interest in decimal
t is Number of Time Periods
n is the number of times interest is compounded per year
in this problem we have
substitute in the formula above
Find out the interest

substitute the values

Answer:
d. f opens upward with a y-intercept at (0, 2); h opens downward with a y-intercept at (0, -2)