For 8 days of very hot weather, the water level in a lake dropped 3 inches per day. On the ninth day, storms raised the level 6 inches. What was the total amount of change in the water level during these 9 days?

Step-by-step explanation:

8 days x 3 inches= 24 inches

(The amount of inches the water went down)

24 inches - 6 inches ( amount the water went up on the 9th dat)

= 18 inches

So, the answer would be:

The total difference over the 9 days, the water went down 18 inches.

Let x = chloe's age.

Let y = Leonel's age.

To help solve this, construct a system of equations.

x = 5 + y.

8y = 3x.

We can solve this by substitution. Substitute 5 + y for x in the second equation.

8y = 3(5 + y). Distribute the 3.

8y = 15 + 3y. Subtract 3y from both sides.

5y = 15. Divide each side by 5.

y = 3. Plug this into one of our original equations.

x = 5 + 3. Add your numbers together.

x = 8

Chloe is 8 years old