Answer:
x + 9
Step-by-step explanation:
Area = 2x^2 + 18x
Width = 2x
Length = ?
The relationship between these quantities is;
Area = Length * Width
Length = Area / Width
Length = (2x^2 + 18x) / 2x
Using long division;
This leads to;
length = x + 9
Checking;
Area = Length * Width
Area = (x + 9) * 2x
Area = 2x^2 + 18x ; This is correct!
Answer:
or -0.625
Step-by-step explanation:
The slope formula is as shown:
We can have A = (,
) and B = (
,
).
We can hence plug in the values into the formula to get .
As we simplify, the negatives on the top row cancel out to give us an addition sign instead and we add them.
Brainliest would be appreciated!
Answer:
Rate of change of the area of the square is 42 units at t = 2.
Step-by-step explanation:
We note that the area of the square is given by: but we aim to find
. But we can use the chain rule to pull out that dA/dt. Doing so gives us:
Now, (by the power rule and
But since we have "x" and not "t", we want to find what x is when t = 2. Substituting t = 2 gives us x(2) = 3(2) + 1 = 7.
So, finally, we see that: