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vesna_86 [32]
2 years ago
8

Question 1 (1 point)

Mathematics
1 answer:
Anna71 [15]2 years ago
5 0

Answer:

A

Step-by-step explanation:

You might be interested in
Find the center and radius of the sphere whose equation is given by x2+y2+z2−2x−4y+8z+17=0x2+y2+z2−2x−4y+8z+17=0.
Vedmedyk [2.9K]
We know that
the equation of a sphere is
(x-h)²+(y-k)²+(z-l)²=r²
where (h,k,l) is the center and r is the radius

we have
x²+y²+z²<span>−2x−4y+8z+17=0
</span>

Group terms that contain the same variable, and move the constant to the opposite side of the equation

(x²+2x)+(y²-4y)+(z²+8z)=-17
<span>Complete the square. Remember to balance the equation by adding the same constants to each side
</span>(x²+2x+1)+(y²-4y+4)+(z²+8z+16)=-17+1+4+16
(x²+2x+1)+(y²-4y+4)+(z²+8z+16)=4

Rewrite as perfect squares

(x+1)²+(y-2²)+(z+4)²=4

(x+1)²+(y-2²)+(z+4)²=2²

the center is the point (-1,2,-4) and the radius is 2 units




4 0
3 years ago
Please help I’ll mark you as brainliest if correct!
xeze [42]

Answer:

♥♥♥

I tried solving this answer and got 25.2. So, I think you're answer will be 25.

Step-by-step explanation:

<em>I divided 63 by 2.5. Hope I helped. </em>

8 0
2 years ago
Read 2 more answers
Hiya Guys , Can you help me if you do one answer each Ill give you a thanks and Stars / Rating and A Brainlist , please help !!!
Volgvan

Answer:

I don't know I'm sorry I will tell you another answer asks me to

6 0
2 years ago
The expanded form of x0 is what
Anestetic [448]

Answer:

Can't really expand x and 0, so I guess it would just be x * 0

Step-by-step explanation:

explained above :)

4 0
2 years ago
1. Sarah and Maya both need notebooks and pencils. The equation that represents Sarah's
STALIN [3.7K]

Step-by-step explanation:

We have y = 13 - 3x and y = 7 - x.

=> 13 - 3x = 7 - x

=> 2x = 6, x = 3.

Then y = 7 - (3), y = 4.

Hence the price of a pencil is $3 and the price of a notebook is $4. (C)

8 0
3 years ago
Read 2 more answers
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