Answer:
yes
Step-by-step explanation:
...
Answer:
The perimeter is 22.
Step-by-step explanation:
The perimeter formula (it sometimes varies) is 2(b+h)
b being base (in this example, 6)
h being height (in this example, 5)
So now, with substitution, we are left with:
2(6+5)
Which simplifies down to:
2(11)
22
Let's say the numbers are "a" and "b"
thus
![\bf y=ab\qquad \begin{cases} a+b=80\\ b=80-a \end{cases}\implies y=a(80-a)\implies y=80a-a^2\\\\ -----------------------------\\\\ \cfrac{dy}{da}=80-2a](https://tex.z-dn.net/?f=%5Cbf%20y%3Dab%5Cqquad%20%0A%5Cbegin%7Bcases%7D%0Aa%2Bb%3D80%5C%5C%0Ab%3D80-a%0A%5Cend%7Bcases%7D%5Cimplies%20y%3Da%2880-a%29%5Cimplies%20y%3D80a-a%5E2%5C%5C%5C%5C%0A-----------------------------%5C%5C%5C%5C%0A%5Ccfrac%7Bdy%7D%7Bda%7D%3D80-2a)
set the derivative to 0, and check the critical points, there's only one anyway
and do a first-derivative test, to see if it's a maximum
That would be : y = 2x + 1
Simplify
9x^3 - 4x + 10 + x^3 + 10x - 9
Collect like terms
(9x^3 + x^3) + (-4x + 10x) + (10 - 9)
Simplify
<u>10x^2 + 6x + 1</u>