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Shalnov [3]
3 years ago
6

For 15, the answer is b correct?

Mathematics
2 answers:
den301095 [7]3 years ago
7 0

Answer:

a. C = (0,0), r = 3

Step-by-step explanation:

No, the 9 is squared. The square root of 9 is ±3. Therefore, the only possible answer is a.

Can I get brainliest

vaieri [72.5K]3 years ago
5 0

Answer:

a C= (0, 0), r = 3

Step-by-step explanation:

For 15th question: a Is the correct answer

{x}^{2}  +  {y}^{2}  = 9 \\  {(x - 0)}^{2}  +  {(y - 0)}^{2}  =  {3}^{2}  \\ equating \: it \: with \\ {(x - h)}^{2}  +  {(y - k)}^{2}  =  {r}^{2} \\h = 0 \\ k = 0 \\c = (h, \:  \: k)  \\ c= (0, \:  \: 0) \\   {r}^{2}  =  {3}^{2}  \\ r = 3

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Step-by-step explanation:

-7y= 7x+21

Divide through by -7:

y = -x - 3

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Which number line shows the solution to −6 − (−2)? A number line is shown from negative 10 to 0 to positive 10. There are increm
VARVARA [1.3K]

Answer:

The correct option is A) A number line is shown from negative 10 to 0 to positive 10. There are increments of 2 on either side of the number line. The even numbers are labeled on either side of the number line. An arrow pointing from 0 to negative 6 is shown. Above this, another arrow pointing from negative 6 to negative 4 is shown. A vertical bar is shown at the tip of the arrowhead of the top arrow.

Step-by-step explanation:

Consider the provided expression.

−6 − (−2)

Open the parentheses and change the sign.

−6 − (−2)

−6 + 2

Subtract the numbers.

−4

Now draw this on number line.

First draw a number line is shown from −10 to 0 to 10. with scale of 2 unit on either side of the number line. Draw an arrow pointing from 0 to −6 Which show −6. Above this, another arrow pointing from −6 to −4 which shows −6 − (−2) = −4. A vertical bar is shown at the tip of the arrowhead of the top arrow.

The required number line is shown in the figure 1.

Hence, the correct option is A) A number line is shown from negative 10 to 0 to positive 10. There are increments of 2 on either side of the number line. The even numbers are labeled on either side of the number line. An arrow pointing from 0 to negative 6 is shown. Above this, another arrow pointing from negative 6 to negative 4 is shown. A vertical bar is shown at the tip of the arrowhead of the top arrow.

4 0
3 years ago
An airplane pilot over the Pacific sights an atoll at an angle of depression of 10°. At this time, the horizontal distance from
Alex17521 [72]
The question was posted incomplete.

This is the part missing:

<span>What is the height of the plane to the nearest meter?

Answer:  559 m.

Explanation:

1) The horizontal distance between the plane and tha atoll makes a right triangle with the height, with the depression angle between the two legs.

2) Therefore, you can use the tangent trigonometric ratio:

tan(10°) = opposite-leg / adyacent-leg = height / horizontal distance

⇒ height = horizontal distance × tan (10°)

⇒ height = 3,172 m × tan(10°) = 559.31 m, which rounded to the nearest m is 559
</span>
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3 years ago
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