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faust18 [17]
3 years ago
8

Multiply the polynomials (a2 + 3a – 7) and (2a2 – a + 4). Simplify the answer.

Mathematics
1 answer:
Alex_Xolod [135]3 years ago
8 0
Answer correct or incorrect

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Find an equation of the sphere which contains points A(1, 3, 2) and B(4, 3, 7) and the distance between A and B is equal to the
Marina86 [1]

Answer:

The answer is 8.5=(x-2.5)^2+(y-3)^2+(z-4.5)^2

Step-by-step explanation:

First we need to find diameter of the sphere. The distance point A and point B is:

d=\sqrt{(4-1)^2+(3-3)^2+(7-2)^2} \\d=\sqrt{3^2+0^2+5^2} \\d=\sqrt{34} \\d=5.83

d/2=r=2.92

radius of the sphere is 2.92 units

and the center of the sphere is:

C=((4+1)/2,(3+3)/2,(7+2)/2)

C=(2.5,3,4.5)

We can write the equation of the sphere as:

r^2=(x-2.5)^2+(y-3)^2+(z-4.5)^2\\8.5=(x-2.5)^2+(y-3)^2+(z-4.5)^2

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3 years ago
What are the chances of landing on heads when tossing one coin?
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Answer:

50%

Step-by-step explanation:

Since there is either heads or tails, meaning only two options you have a 50% chance of getting heads

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What is the type of sweet wine made in tuscany using dried grapes and extensive aging?
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