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4 years ago

I have A and B, I need help with C.

Mathematics

1 answer:

WARRIOR [948]4 years ago

8 0

The answer is $382.80. the perimeter is 600ft. if fence post are placed every five feet, you need 120 post because 600÷5 is 120. each post cost 3.19 so you need 382.80 because 3.19×120 is 382.8

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Prove algebraically that r = 10/2+2sinTheta is a parabola

Xelga [282]

Answer:

$y = - \frac{ 1 }{10} {x}^{2} + \frac{5}{2}$

Step-by-step explanation:

We want to prove algebraically that:

$r = \frac{10}{2 + 2 \sin \theta}$

is a parabola.

We use the relations

${r}^{2} = {x}^{2} + {y}^{2}$

and

$y = r \sin \theta$

Before we substitute, let us rewrite the equation to get:

$r(2 + 2 \sin \theta) = 10$

$r(1+ \sin \theta) = 5$

Expand :

$r+ r\sin \theta= 5$

We now substitute to get:

$\sqrt{ {x}^{2} + {y}^{2} } + y = 5$

This means that:

$\sqrt{ {x}^{2} + {y}^{2} }=5 - y$

Square:

${x}^{2} + {y}^{2} =(5 - y)^{2}$

Expand:

${x}^{2} + {y}^{2} =25 - 10y + {y}^{2}$

${x}^{2} =25 - 10y$

${x}^{2} - 25 = - 10y$

$y = - \frac{ {x}^{2} }{10} + \frac{5}{2}$

This is a parabola (0,2.5) and turns upside down.

4 0

3 years ago

For f(x) = 4x+1 and g(x) = x^2 -5, find (f-g)(x)

d1i1m1o1n [39]

Answer:

(f-g)(x) is given by -x^2+4x+6

Step-by-step explanation:

4 0

2 years ago

I really NEED HELP<br> Ill give you a brainiest if you guys help me ASAP because I dont understand

MAXImum [283]

Answer:

<h2>I think it is B if I am wrong i am <u><em>sooooo</em></u> sorry!</h2>

Step-by-step explanation:

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8 0

2 years ago

Read 2 more answers

Height is 6.2cm length is 10.8cm what’s the area.

mariarad [96]

Answer:

its 66.96

Step-by-step explanation:

to find the area we do the length x height of the shape

3 0

3 years ago

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Out of a 52 deck of cards what's the probability that you pull a card above a jack

bazaltina [42]

Answer: 3/13

Step-by-step explanation:

There are 12 cards above the jack in a deck of 52 cards

Probability = 12/52 = 3/13

7 0

3 years ago