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KATRIN_1 [288]
3 years ago
6

Help me out please !!!!!

Mathematics
2 answers:
evablogger [386]3 years ago
7 0

Answer:

37

Step-by-step explanation:

45+98+x=180


marysya [2.9K]3 years ago
5 0
X = 37 , triangles equal 180° so 98+45=143 so 180-143= 37.
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A train arrives at a stop every 30 minutes and stays there for 6 minutes. What is the probability that the train will be at your
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in a batch of 280 water purifiers,12 were found to be defective. what is the probability that a water purifier chosen at random
Naddika [18.5K]

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4.286%

Step-by-step explanation:

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If UW=6x-35, UV=19, VW=4x-20 , what is UW
Anarel [89]
Since V is a point on the line UW, therefore:
the length of UV + the length of VW = the length of UW
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19 - 20 + 35 = 6x - 4x
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3 0
4 years ago
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One number is 4 times another number. The sum of their reciprocals is 5. What are the two numbers?
ivann1987 [24]

Answer:

The two number are:

y=1,\:x=\frac{1}{4}

Step-by-step explanation:

  • Let 'x' be the first number
  • let 'y' be the second number

Given that one number is 4 times another number, the first equation is

y = 4x

Next, the sum of their reciprocals is 5, so

\frac{1}{x}+\frac{1}{y}=5

Now, we have the system of equations

\begin{bmatrix}y=4x\\ \frac{1}{x}+\frac{1}{y}=5\end{bmatrix}

Let us solve the system of equations

\begin{bmatrix}y=4x\\ \frac{1}{x}+\frac{1}{y}=5\end{bmatrix}

substitute y = 4x in the equation \frac{1}{x}+\frac{1}{y}=5

\frac{1}{x}+\frac{1}{4x}=5

Least Common Multiple of x, 4x:  4x

Adjust fractions based on L.C.M

\frac{4}{4x}+\frac{1}{4x}=5

\frac{4+1}{4x}=5

\:\frac{5}{4x}=5

Multiply both sides by 4x

\frac{5}{4x}\cdot \:4x=5\cdot \:4x

Simplify

5=20x

switch sides

20x=5

Divide both sides by 20

\frac{20x}{20}=\frac{5}{20}

Simplify

x=\frac{1}{4}

For y = 4x, substitute x=\frac{1}{4}

y = 4x

y=4\cdot \frac{1}{4}

y=1

Therefore, the two number are:

y=1,\:x=\frac{1}{4}

<u>Verification:</u>

\frac{1}{x}+\frac{1}{y}=5

substituting y=1,\:x=\frac{1}{4}

\:\frac{1}{\frac{1}{4}}+\frac{1}{1}=\:5\:\:

4+1=5

5 = 5

L.H.S = R.H.S

and

y = 4x

substituting y=1,\:x=\frac{1}{4}

y\:=\:4\left(\frac{1}{4}\right)

y=1

8 0
3 years ago
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