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kakasveta [241]
3 years ago
13

It costs $3 for a pack of 20 pencils. Find the cost per pencil.

Mathematics
2 answers:
Cerrena [4.2K]3 years ago
7 0

Answer:

20/3

Step-by-step explanation:

notsponge [240]3 years ago
3 0

Answer:

15 cents right?

Step-by-step explanation:

3/20=.15

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Find cosØ if sinØ=-12/13 and tanØ&gt;0.<br><br> A) -5/12<br> B) -5/13<br> C) 12/5<br> D) -13/12
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Answer:

-5/13

Step-by-step explanation:

sin theta = opp / hyp

sin theta = -12 /13

we can find the adj side by using the pythagorean theorem

adj^2 + opp ^2 = hyp^2

adj^2 +(-12)^2 = 13^2

adj^2 +144 =169

adj^2 = 169-144

adj^2 = 25

Taking the square root of each side

adj = ±5

We know that it has to be negative since it is in the third quad

adj = -5

cos theta = adj / hyp

cos theta = -5/13

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3 years ago
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Step-by-step explanation:

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An example of a(n) ___is 5, 12 and 13.
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Answer:

Pythagorean triple

Step-by-step explanation:

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