That would be -2 1/2 , 3 1/2
Answer:
Step-by-step explanation:
12a)To rationalize the denominator, multiply the denominator and numerator by √5.

b) (a+b)² = a² + 2ab + b²
(1 +√3)² = 1² + 2*1*√3 + (√3)²
= 1 + 2√3 + 3
= 4 + 2√3
a = 4 ; b =2
13) (a + b)(a - b) = a² - b²

Answer:
400 m^2.
Step-by-step explanation:
The largest area is obtained where the enclosure is a square.
I think that's the right answer because a square is a special form of a rectangle.
So the square would be 20 * 20 = 400 m^2.
Proof:
Let the sides of the rectangle be x and y m long
The area A = xy.
Also the perimeter 2x + 2y = 80
x + y = 40
y = 40 - x.
So substituting for y in A = xy:-
A = x(40 - x)
A = 40x - x^2
For maximum value of A we find the derivative and equate it to 0:
derivative A' = 40 - 2x = 0
2x = 40
x = 20.
So y = 40 - x
= 40 - 20
=20
x and y are the same value so x = y.
Therefore for maximum area the rectangle is a square.
Vaughn and Xi are not partners in Wind Systems because they do not have joint control over the business.
<h3>Who is a partner in a business?</h3>
A partner is a person who shares in the profit and loss of a business. A partner is also involved in the running of the business.
A partner is sometimes needed because one person might not have the knowledge and know how of running a business. Also, a partner might be needed to raise enough capital for the business.
To learn more about partners, please check: brainly.com/question/22693552
7xp-6xp+2+8
Hopefully this helps!
Xoxo xoxo
Shelby<33