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NISA [10]
1 year ago
9

A circle is described by the equation x2 y2 14x 2y 14 = 0. what are the coordinates for the center of the circle and the length

of the radius?
Mathematics
1 answer:
bearhunter [10]1 year ago
6 0

Answer:

length is (-7,-1) and radius is 6

Step-by-step explanation:

We are given the expression of the equation of a circle that is

x2 + y2 + 14x + 2y + 14 = 0.

Using completing the squares:

x2 + y2 + 14x + 2y + 14 = 0(x+7)^2 + (y+1) ^2 = -14 + 49 + 1(x+7)^2 + (y+1) ^2 = 36 center thus is at (-7,-1) and the radius is equal to square root of 36 equal to 6.

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Alice has a basket containing 6 red socks, 4 blue socks, and 12 white socks. Find the theoretical probability that Alice will ra
mrs_skeptik [129]
There is a 42.22% chance 
7 0
3 years ago
Coronavirus cases rose from 23 cases on October 3rd to 103 cases on November 3rd .What was the percent increase based on the ori
nika2105 [10]
23/103 = 0.22

0.22*100 = 22%

The percentage increase is 22%


Hope that helps!
7 0
2 years ago
PLEASE HELP ASAP!!
NNADVOKAT [17]

Answer (the system of equations input doesn't work, so there is no brace):

x = 1.5y

x + y =800

Step-by-step explanation:

First, identify the vital information:

- 800 total students

- 1.5 times as many boys as girls

So, if x = number of boys and y = number of girls, we can agree that:

x = 1.5y

And because there are 800 kids in total, we can agree that:

x + y = 800

There are 320 girls and 480 boys. (see below)

Since you have the value of x, 1.5y, you can plug-in the value:

x + y = 800

1.5 + y = 800

2.5y = 800

y = 320 girls

Plug-in the y-value into the equation for the number of boys:

x = 1.5y

x = 1.5(320)

x = 480 boys

To double-check:

320 + 480 = 800 ☺

8 0
3 years ago
mr johnson stayed four nights at a hotel . his bill 2as $725 before the sales tax of 6% was added . how much was the sale tax?
rjkz [21]
Let us first concentrate on the information’s that are already given in the question. Based on those information’s the answer to the question can be easily found.
Bill amount for Mr. Johnson before sales tax = $725
Percentage of sales tax taken = 6%
Then
Amount of sales tax = (6/100) * 725
                                 = 4350/100 dollars
                                 = 43.5 dollars
So the amount of sales tax that had to be given is $43.5. <span>I hope the procedure for doing this problem is clear to you.
</span>


6 0
3 years ago
口
iVinArrow [24]
The third one is correct.
5 0
3 years ago
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