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3 years ago

Anyone knows the answer?

Mathematics

1 answer:

antiseptic1488 [7]3 years ago

8 0

Sorry no but you can search up the question on google and maybe try that

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7. Kamal gives the following proof that y−1=8/9(x+10) is the equation of a line that is tangent to a circle given by

leonid [27]

Answer with Step-by-step explanation:

We are given that equation of circle

$(x+1)^2+(y-9)^2=145=(\sqrt{145})^2$

Compare with equation of circle

$(x-h)^2+(y-k)^2=r^2$

Where (h,k)=Center of circle

r=Radius of circle

We get circle of center=(-1,9)

Radius=12.04

The point (-10,1) is on the circle because it satisfied the circle equation .

Slope of radius= $\frac{1-9}{-10+1}=\frac{8}{9}$

By using slope formula

Slope: $m=\frac{y_2-y_1}{x_2-x_1}$

We know that radius is perpendicular to the tangent.

When two lines are perpendicular then their slope is opposite reciprocal to each other.

Slope of tangent= $-\frac{1}{\frac{8}{9}}=-\frac{9}{8}$

Now, the equation of tangent passing through the point(-10,1) with slope-9/8 is given by

$y-1=-\frac{9}{8}(x+10)$

By using point-slope form

$y-y_1=m(x-x_1)$

a.Kamal has made an error to find the slope of tangent .

Slope of tangent= $-\frac{9}{8}$

But he used slope of tangent 8/9

b.The equation of tangent line

$y-1=-\frac{9}{8}(x+10)$

7 0

3 years ago

Given a = πr2s 360 , solve for s.

Dvinal [7]

If you would like to solve a = <span>πr^2s + 360 for s, you can do this using the following steps:

</span>a = πr^2s + 360
a - 360 = πr^2s
s = (a - 360) / (πr^2)

The correct result would be s = (a - 360) / (πr^2).

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3 years ago

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When given a word problem, what should you always do to better visualize the problem?

Aliun [14]

Step-by-step explanation:

1.Read the Entire Word Problem.

2.Think About the Word Problem.

3.Write on the Word Problem.

4.Draw a Simple Picture and Label It.

5.Estimate the Answer Before Solving.

6.Check Your Work When Done.

7.Practice Word Problems Often.

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3 years ago

2) ONE 200 - Gram bag of rice cost $8.12. How much does 1 kilogram of rice cost? (Note that 1000g = 1kg.)

NARA [144]

1000 gram = 1 kilogram
If 200 gram = $8.12. 1, it means we can get 5 bags of such amount (1000/200 = 5)
Therefore, 1kg = $8.12 * 5 = $40.6

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3 years ago

Describe, with examples of your own, when you would use long division and synthetic division and how to check polynomial divisio

puteri [66]

You use long division when you divide polynomial by other polynomials. You use synthetic division to divide polynomials by binomials of the form (x-k).

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3 years ago

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