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3 years ago

Ken paid $12 for two magazines the cost of each magazine was a multiple of $3 what are the possible prices of the magazines

Mathematics

1 answer:

defon3 years ago

8 0

The price could have been 6 each or 9 for one and 3 for the other

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Law of cosines <br><br> HELP MES

Lorico [155]

Answer:

70.52 degrees

Step-by-step explanation:

To find the angles, we must first find the lengths of each side of the triangle. Adding up the respective radii, we can see that

XY = 5+4 = 9 CM

XZ = 6+5 = 11 CM

ZY = 4+6 = 10 CM

Now we can apply the cosine rule

$C\:=\:\sqrt{A^2+B^2-2ABcosx}$

We need to rearrange the rule to solve for x, our missing angle

$x\:=\:cos^{-1}\left(\frac{a^2+b^2-c^2}{2ab}\right)$

solving for our unknown angle:

$x\:=\:cos^{-1}\left(\frac{9^2+10^2-11^2}{2\cdot 9\cdot 10}\right)$

$x\:=\:70.52^{\circ }$

Therefore angle YXZ is 70.52 degrees

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riadik2000 [5.3K]

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Step-by-step explanation:

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Alecsey [184]

Answer:

Step-by-step explanation:

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