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k0ka [10]
4 years ago
7

What numbers have an absolute value of 2 1/2

Mathematics
1 answer:
7nadin3 [17]4 years ago
7 0
The absolute value of a number is that number's distance from zero. It will always be positive, even if the original number was negative.

| x | = x
| -x | = x

So,
|2 1/2| = 2 1/2
and
|-2 1/2| = 2 1/2

Hope this helps! :)
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2st2-s2 for s=3 t=6 what the answer
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Answer:

3

Step-by-step explanation:

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Given f(x)= -x+15, what is f(-3) A.-45 B.12 C.18 D.45
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Find the values of x and y
zhuklara [117]

You can use a tangent:

tangent=\dfrac{opposite}{adjacent}

We have opposite = 17 and adjacent = x.

\tan30^o=\dfrac{\sqrt3}{3}

substitute:

\dfrac{17}{x}=\dfrac{\sqrt3}{3}       cross multiply

x\sqrt3=(3)(17)     multiply both sides by √3

x(\sqrt3)(\sqrt3)=51\sqrt3

3x=51\sqrt3      divide both sides by 3

x=17\sqrt3

Use the Pythagorean theorem:

y^2=(17\sqrt3)^2+17^2\\\\y^2=289(\sqrt3)^2+289\\\\y^2=289\cdot3+289\\\\y^2=867+289\\\\y^2=1156\to y=\sqrt{1156}\\\\y=34

-------------------------------------------------------------------------------------------------

Other method.

30^o-60^o-90^o triangle.

The sides are in the ratio 1:2:\sqrt3\to17:y:x

Therefore

17:(2\cdot17):(17\sqrt3)\to17:34:17\sqrt3\to x=34,\ y=17\sqrt3

 


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