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3 years ago

15

Help please . 10 points

1 answer:

V125BC [204]3 years ago

3 0

Answer:

xtsLztfahlzkfxsh bldg MS much k stick us rich l dips ssssseereeeeeexxxxxxxx

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Find an equation of the sphere through the point (4,3,-1) and has center (3,8,1).

sleet_krkn [62]

Answer:

$(x - 3)^{2} + (y - 8)^{2} + (z - 1)^{2} = 30$

Step-by-step explanation:

The general equation of a sphere is as follows:

$(x - x_{c})^{2} + (y - y_{c})^{2} + (z - z_{c})^{2} = r^{2}$

In which the center is $(x_{c}, y_{c}, z_{c}$ , and r is the radius.

In this problem, we have that:

$x_{c} = 3, y_{c} = 8, z_{c} = 1$

So

$(x - 3)^{2} + (y - 8)^{2} + (z - 1)^{2} = r^{2}$

through the point (4,3,-1)

This leads us to find the radius.

$(4 - 3)^{2} + (3 - 8)^{2} + (-1 - 1)^{2} = r^{2}$

$r^{2} = 1 + 25 + 4$

$r^{2} = 30$

So the equation of the sphere is:

$(x - 3)^{2} + (y - 8)^{2} + (z - 1)^{2} = 30$

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3 years ago

F(x)=5x^2+10x express f in standard form

Mkey [24]

Answer: F(x) = 5x^2 + 10x

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3 years ago

The scale on a road map indicates that 2 inches = 30 miles. How many inches would represent 120 miles on this road map?

qwelly [4]

In:mi

2 = 30

x = 120

2/30=x/120

(Cross Multiply)

30x= 240

30x/30=240/30

X=8

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3 years ago

4(5c + 3) and 9c + 7 Is equivalent

Arlecino [84]

Answer:

False

Step-by-step explanation:

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Is it possiible to develop a place without a prior plan?give four points

Volgvan

Uhmmmm is there a picture of the problem i’m confused

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