2 years ago

I need help extra points and work brainlyisr

Mathematics

1 answer:

arsen [322]2 years ago

8 0

Answer:

106.25

Step-by-step explanation:

if u multiply 8.5 by 12.5 then you get 106.25 :)

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Which ordered pair is shown on the graph?

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(2,4)

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look at the x axis and y axis and see where they meet

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Let n be a natural number. Show that 3 | n3 −n

Vladimir [108]

Let $n=1$ . Then $n^3-n=1^3-1=0$ . By convention, every non-zero integer $n$ divides 0, so $3\vert n^3-n$ .

Suppose this relation holds for $n=k$ , i.e. $3\vert k^3-k$ . We then hope to show it must also hold for $n=k+1$ .

You have

$(k+1)^3-(k+1)=(k^3+3k^2+3k+1)-(k+1)=(k^3-k)+3(k^2+k)$

We assumed that $3\vert k^3-k$ , and it's clear that $3\vert 3(k^2+k)$ because $3(k^2+k)$ is a multiple of 3. This means the remainder upon divides $(k+1)^3-(k+1)$ must be 0, and therefore the relation holds for $n=k+1$ . This proves the statement.

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2 years ago

If “x” represents the full price of an item, write an expression to represent the final cost of an item that is 20% off.

zloy xaker [14]

The expression is x -20%

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3 years ago

I need answer please answer

olga2289 [7]

Step-by-step explanation:

x+30°=180°{ straight angle}

x=180-30

x=150°

<h3>stay safe healthy and happy.</h3>

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