Answer: In 8 days it will decrease by 16 inches and in 15 days the water depth changes by 30 inches.
Step-by-step explanation:
The water depth decreases at a rate of 2 inches per day so in this case if were to write it as an expression it will be -2x where x is the number of days.
We will have to set it equal the total amount that it has decreased which will be y.
y= -2x If x represent the number of days we will put in the days and solve for y.
y = -2(8)
y = -16 This means that in 8 days it will decrease by 16 inches.
y = -2(15)
y= -30 This also means that in 15 days the water depth changes by 30 inches.
