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Ira Lisetskai [31]
3 years ago
13

Please help!! choices for for the first one is $5, $15, $10, $20

Mathematics
1 answer:
vodka [1.7K]3 years ago
7 0

Answer:

5, 240

Step-by-step explanation:

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What is a radius of a circle given by the equation x²-2x+8y-47=0
Zolol [24]
First, we are going to rewrite it as a parabola equation.
Rewrite.
8y=-x^2+2x+47
Divide by 8.
y=-\frac{x^2}{8}+\frac{x}{4}+\frac{47}{8}
Factor out coefficient.
y=-\frac{1}{8}\left(x^2-2x\right)+\frac{47}{8}
Then, we are going to convert x into square form.
y=-\frac{1}{8}\left(x^2-2x+1\right)+\frac{1}{8}\cdot \:1+\frac{47}{8}
Convert the whole expression into square form.
y=-\frac{1}{8}\left(x-1\right)^2+\frac{1}{8}\cdot \:1+\frac{47}{8}
Simplify.
y=-\frac{1}{8}\left(x-1\right)^2+6
Subtract 6 from both sides.
y-6=-\frac{1}{8}\left(x-1\right)^2
Divide by coefficient.
-8\left(y-6\right)=\left(x-1\right)^2
Rewrite in standard form.
4\left(-2\right)\left(y-6\right)=\left(x-1\right)^2

The radius of the circle will be -2. Also, no matter what the sign says, the radius has to always be positive. 
Have a nice day! :)
7 0
3 years ago
Read 2 more answers
Pls pls pls pls help e out with this
Mice21 [21]

Answer:

3(n+7)-6=2n+10+n

Step-by-step explanation:

5 0
2 years ago
Please help me with this I will give brainleist:):)
lara31 [8.8K]
Y intercept is +1
Slope is 1/2
Y= 1/2x + 1
4 0
3 years ago
Please help please...
SpyIntel [72]

Answer:

2

Step-by-step explanation:

5(2)+2=12

(2)+4=6

5x+2 is twice the length of x+4. Therefore the answer is 2

4 0
3 years ago
Read 2 more answers
Item 15<br> Find the sale price.<br> Original price: $50<br><br> Discount: 15%
amm1812

Answer:

$42.5

Step-by-step explanation:

Find how much is 15% of 50 first

(15/100)×50=$7.5

$7.5 is the amount that will be discounted so

$50(original price)-$7.5(discount)=$42.5

7 0
2 years ago
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