Which of NerdWallets safety recommendations do you think is MOST important for

Mathematics

1 answer:

Aleksandr [31]3 years ago

3 0

Answer:

Adding a pin

Step-by-step explanation:

In case your account gets overtaken, there is no possible way for them to actually take your account because with that pin there is 10,000 combinations possible and I doubt they would want to go through each one just to take your account.

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Jacob wants to build a rectangular enclosure for his animals. One side of the pen will be against the barn, so he needs no fence

Citrus2011 [14]

Jacob wants to build a rectangular enclosure for his animals. One side of the pen will be against the barn,so he needs no fence on that side.

Let w be the width of the enclosure (perpendicular to the barn) and let l be the length of the enclosure (parallel to the barn).

one side of the length is not counted for perimeter because one side of length will be against the barn.

Perimeter = 400 ft

Perimeter of rectangle = L + W + W

400 = L + 2W

L = 400 - 2W

Area = L * W

Replace L by 400 - 2W

A(W) = (400 - 2W) * W

$A(W) = -2W^2 + 400W$

Now we find out x coordinate of vertex to find the width that maximize the area

$W = \frac{-b}{2a}$

a= -2 and b = 400

$W = \frac{-(400)}{2(-2)}=100$

The width w would maximize the area is w = 100ft

To find maximum area we plug in 100 for W in A(W)

$A(W) = -2W^2 + 400W$

$A(W) = -2(100)^2 + 400(100)= 20000$

the maximum area is 20,000 square feet

6 0

4 years ago

A circle has its Center at (-2, 5) and a radius of 4 units. What is the equation of the circle?

Artist 52 [7]

$\bf \textit{equation of a circle}\\\\ 
(x- h)^2+(y- k)^2= r^2
\qquad 
center~~(\stackrel{-2}{ h},\stackrel{5}{ k})\qquad \qquad 
radius=\stackrel{4}{ r}
\\\\\\\
[x-(-2)]^2+[y-5]^2=4^2\implies (x+2)^2+(y-5)^2=16$