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3 years ago

Need an answer fast!!!

Mathematics

1 answer:

trapecia [35]3 years ago

4 0

Answer:

The length of the line segment is of 5.9 units.

Step-by-step explanation:

Distance between two points:

Suppose that we have two points, $(x_1,y_1)$ and $(x_2,y_2)$ . The distance between these two points is given by:

$D = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

How long is the line segment?

The distance between points P and Q. So

P(1,3), and Q(4,8).

$D = \sqrt{(4-1)^2+(8-3)^2} = \sqrt{3^2 + 5^2} = \sqrt{34} = 5.9$

The length of the line segment is of 5.9 units.

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If i have 10% off the regular price of 3.30 what is the slae price

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Answer:

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Step-by-step explanation:

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3 years ago

Jeff writes comic strips for local newspaper. The number of comic strips he created is represented by the function f(x)=3x, wher

grin007 [14]

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3 years ago

The equation x^2 + y^2 + 21 = 40 + 18y. What is the radius of this cookie?

trapecia [35]

Answer:

The radius is 10

Step-by-step explanation:

Given

$x^2 + y^2 + 21 = 40 + 18y.$

Required

The radius

Rewrite as:

$x^2 + y^2 - 18y = 40-21$

Subtract 81 from both sides

$x^2 + y^2 - 18y +81= 40-21+81$

Expand

$x^2 + y^2 - 9y - 9y +81= 40-21+81$

Factorize

$x^2 + y( y- 9) - 9(y -9)= 40-21+81$

Factor out y - 9

$x^2 + (y- 9) (y -9)= 40-21+81$

Express as squares

$x^2 + (y- 9)^2= 100$

$x^2 + (y- 9)= 10^2$

The equation of a circle is:

$(x - a)^2 + (y- b)= r^2$

By comparison:

$r^2=10^2$

$r = 10$

6 0

3 years ago

Please someone help!!! (Open the picture)

Elina [12.6K]

Hello, please consider the following.

a) You need to replace x by -1.

$f(-1)=4*1-3*(-1)+5=4+3+5=12$

b) You need to replace x by 2t and simplify.

$f(2t)=4*(2^2t^2)-3*(2t)+5=16t^2-6t+5$

c) You need to replace x by t-2 and develop, and simplify.

$f(t-2)=4(t-2)^2-3(t-2)+5\\\\=4(t^2-4t+4)-3t+6+5\\\\=4t^2-16t+16-3t+11\\\\=4t^2-19t+27$

Thank you.

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3 years ago

HELP ASAP!!!!!!!!!!!!

PIT_PIT [208]

To calculate the standard deviation of those numbers:
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Work out the Mean (the simple average of the numbers)
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Then for each number: subtract the Mean and square the result.

Then work out the mean of those squared differences.Take the square root of that and we are done!

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3 years ago