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Monica [59]
3 years ago
7

Help help help it is simple one​

Mathematics
1 answer:
algol [13]3 years ago
5 0

Answer:

3^{ -x+3}

Step-by-step explanation:

We need to simplify out the given exponential expression . The given expression to us is ,

\rm\implies \dfrac{\dfrac{1}{3}}{3^{x-4}}

We can use the <u>Law of </u><u>Exponents</u> to simplify the given expression . Recall that ,

\rm\implies \red{\dfrac{a^m}{a^n}= a^{m-n}}

Note that , we can write ,

\rm\implies \dfrac{1}{3}= 3^{-1}

Therefore our expression becomes ,

\rm\implies \dfrac{ 3^{-1}}{3^{x-4}}

Simpify using the Law of Exponents ,

\rm\implies 3^{ -1 - ( x - 4 )}

Open the brackets in exponent ,

\rm\implies 3^{ -1 - x +4 }

Simplify to get final expression ,

\rm\implies \boxed{\quad \blue{ 3^{-x+3} \quad}}

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chubhunter [2.5K]

Answer:


Step-by-step explanation:

(A) The vertices of the trapezoid KLMN are K(1, 3) , L(3, 1) , M(3, 0) , and N(1, −2)

Now, KL= \sqrt{(3-1)^{2}+(1-3)^{2}}=\sqrt{8}[/tex]

LM=\sqrt{(3-3)^{2}+(0-1)^{2}}=1

MN=\sqrt{(1-3)^{2}+(-2-0)^{2}}=\sqrt{8}

NK=\sqrt{(1-1)^{2}+(-2-3)^{2}}=5

Now, as KL and MN  are equal, therefore, KLMN is an isosceles trapezoid.

(B) Since  m∠XWY=47°, therefore ∠XWZ=47+47=94° and ∠ZYW=18°, therefore ∠XYZ=36°( as diagonals bisect the angles)

In ΔXWO,

∠XWO+∠WXO+∠WOX=180°(Angle sum property)

∠WXO=43°

Also, from ΔXOY,

∠OXY=72° using the angle sum property.

Therefore, ∠WXY=43+72=115°

Now, sum of all the angles of a quadrilateral is equal to 360°, therefore

∠WXY+∠XYZ+∠YZW+∠ZWX=360°

115°+36°+∠YZW+94°=360°

∠YZW=115°

Therefore,∠WZY=115°

(C) Since, AB and CD are the two parallel lines as the slope of both the sides are equal.

LetM be the mid point of AB, therefore M=(\frac{-2+4}{2}, \frac{4+3}{2})

=(1,\frac{7}{2})

Also, let N be the mid point of DC, therefore,

N=(\frac{4-2}{2},\frac{-2-5}{2})

=(1,\frac{-7}{2})

Now, length of the mid segment MN= \sqrt{(1-1)^{2}+(\frac{7}{2}+\frac{7}{2})^{2}}=\sqrt{0+49}=7 cm

(D)Given: Kite PQRS,  TS=6cm and TP=8cm

Then, From triangle TSP, we have

(SP)^{2}=(TS)^{2}+(TP)^{2}

(SP)^{2}=36+64

SP=10cm

8 0
3 years ago
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lidiya [134]

answer

step by step explanation

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Step-by-step explanation:

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There are 645 students at Tech Middle School, and
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^^^^^^^^^^
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