The perimeter is:
P = 2x + 2y = 80
The area is:
A = x * y
The area as a function of a variable is:
A (x) = x * (40-x)
Rewriting we have:
A (x) = 40x-x ^ 2
We derive the function:
A '(x) = 40-2x
We equal zero and clear x:
40-2x = 0
2x = 40
x = 40/2
x = 20 feet
The other dimension is:
y = 40 - x
y = 40 - 20
y = 20 feet
The area will be:
A = x * y
A = 20 * 20
A = 400 feet ^ 2
Answer:
The dimensions are:
x = 20 feet
y = 20 feet
The area is:
A = 400 feet ^ 2
The answer is Mary, Mary got 88% Ben got 86% and Jim got 85%
To add fractions they're suppose to have the same base or denominator then u add the top
To subtract it's the same but u subtract the top
Considering the withdraws and credits, Lucia's current available balance is of $65.53.
<h3>How do we find a balance?</h3>
It is given by the sum of the money that the people has with the pending credits, and subtracted by the pending withdraws.
In this problem, we have that:
- Lucia has $412.76, with pending credits of $134.00.
- She has pending withdraws of $481.23.
Hence, her avaiable balance is given by:
412.76 + 134 - 481.23 = $65.53.
More can be learned about balances at brainly.com/question/26867415
