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erma4kov [3.2K]
3 years ago
15

Whoever is good at math, please help me!

Mathematics
1 answer:
Kruka [31]3 years ago
4 0

Answer:

I think it is 62.4 km.

Step-by-step explanation:

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If a+b+c=16 and a^2+b^2+c^2=90 then find the value a^3+b^3+c^3-3abc
grin007 [14]

(a+b+c)^2=a^2+b^2+c^2+2(ab+bc+ca)\\(16)^2=90+2(ab+bc+ca)\\256-90=2(ab+bc+ca)\\166/2=ab+bc+ca\\83=ab+bc+ca\\a^3-b^3-c^3-3abc=(a+b+c)(a^2+b^2+c^2-ab-bc-ca)\\(a+b+c)(a^2+b^2+c^2-(ab+bc+ca))\\16(90-(83))\\16(7)\\=112

3 0
3 years ago
The circumference of a circle is 6 pi cm what is the length of an arc of 140 degree
ValentinkaMS [17]
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3 0
3 years ago
Line M passes through the points (5,1) and (8,6) while line n passes through the point (-4,3) and (-1,8) . Which statement accur
kirill [66]
M=(6-1)/(8-5)=5/3

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...

m=(8-3)/(-1--4)=5/3...

y=5x/3+b, using (-1,8)

8=-5/3+b

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Since they have the same slope and difference y-intercepts they are parallel lines and will never intersect.
4 0
3 years ago
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How do u do this problem
atroni [7]
Alexis and 3 friends buy:
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Now we're adding all the prices together. 
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At this point, we're going to make the expression, using all the steps that we did.
( 4 x 4 ) + ( 1 x 4 ) + ( 2 x 4 )

We used parenthesis to show that those expressions need to be done first before anything else.

This is how we make an expression and we find the total answer.

The expression would be: ( 4 x 4 ) + ( 1 x 4 ) + ( 2 x 4 )
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Hope this helps!~
5 0
3 years ago
Solve the following non-linear system. Show all work.
dybincka [34]

Answer:

7y=x

Step-by-step explanation:

8 0
3 years ago
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