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lions [1.4K]
3 years ago
12

The equation for the circle below is x2 + y2 = 16. What is the length of the circle's radius?

Mathematics
1 answer:
ikadub [295]3 years ago
8 0

Answer:

8

Step-by-step explanation:

Because 16 is the diameter and to find the radius you need to divide by 2

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A backyard pool has a concrete walkway around it that is 3 feet wide on all sides. The total area of the pool and the walkway is
Gnoma [55]

Answer:

<h2><em>29.4 length and 21.4 width.</em></h2>

Step-by-step explanation:

To fin the dimensions of the pool we need to use the total area of the pool plus the concrete walkway. Lets say that <em>W </em>is the width and <em>L </em>the length. We know that, the walkway has 3 ft wide, this means that the width and length are increased by 6ft (3ft on each side). So, the total area can be expressed like this:  A_{total} = (L+6)(W+6).

In addition, we know that the total area is 970 and the length is 8 ft longer than the width (L=W+8). So:

A_{total} = (L+6)(W+6)\\970 = (W+8+6)(W+6)\\970=W^{2}+20W+84\\W^{2}+20W-886=0

With this quadratic equation we're gonna have to solution, the most reasonable is part of the answer. So, solving the equation we have as solutions: W_{1}=21.4 and  W_{2}=-41.4

Therefore, the width is 21.4 ft, because the negative number cannot represent distances.

Using the relation between length and width:

L=W+8\\L=21.4+8=29.4

<em>Therefore, the dimensions of the pool are 29.4 length and 21.4 width.</em>

7 0
3 years ago
I WILL GIVE BRAINLIEST ANSWER!!!
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Answer:

10 is unbiased

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Step-by-step explanation:

10 is unbiased

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2 years ago
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Steven wants to buy a $565 bicycle. Steven has no money saved. But will be able to deposit $30 into a savings account when he re
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565+65=630 so he needs that much to get the bike AND pay his sister back. 630 divided by $30 is 21. So, in 21 weeks, Steven Can pay back his sister and get the bike
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What is the area of a rectangle with a length of 5 units and a width of 8 units
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Answer:

40 square units

Step-by-step explanation:

A = LW

A = 5 units x 8 units

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2 years ago
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