Answer:
4 2/5 or 4.4
Step-by-step explanation:
2/5 = 0.4
4.0 + 0.4 = 4.4
Hi there!
Your question is:
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. Write and find the value of an expression for the change in the water level of the lake during these 9 days.Here is my answer:
If the water level drops 3 inches per day for eight days, it would have gone down a total of 24 inches over those 8 days. Now, the rain storm added 9 inches of water back to the lake. 24 - 9 = 15.
Summary:
8 x 3 = 24
-24 + 9 = -15.
I hope this helped you, and dont hesitate to ask me for anymore help if you need it.
Stay Crazzzzzy! xD
The purple dot goes in the 5. For the green dot count 3! Lines to the left (where there’s no numbers, that’s your left) and there it goes.
The opposite of 4x is -4x and the opposite of -5+4x is 5+-4x
To find the rate of change, you look at how much the y value increases with a change of 1 x. We see that as x increases from 1 to 2, y increases from 120 to 144. Then we subtract 144-120 to find the rate of change, which is just 24 (also note that x changes by 1 here).
Then for the initial value:
We see that y increases by 24 for 1 x, so subtracting the value at x=1 by 24 we get 120-24 = 96, which is the initial value.
Hope this helps
