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Mashutka [201]
3 years ago
14

Solve the equation. Check your solution. 2v + 7 = 3

Mathematics
2 answers:
Mademuasel [1]3 years ago
7 0
2v = 2X-2
V = -2
2 X -2 = -4
-4 + 7 = 3
Leviafan [203]3 years ago
4 0
2v + 7 = 3
subtract 7 from both sides
2v = -4
divide both sides by 2 to isolate the variable 
v = -2

to check: 
2(-2) + 7 =?= 3
-4 + 7 =?= 3
3 = 3
✅

Hope this helps :)
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Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 141 millimeters,
tiny-mole [99]

Answer:

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Step-by-step explanation:

We are given that Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 141 millimetres, and a standard deviation of 7.

A random sample of 39 steel bolts is selected.

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The z score probability distribution for sample mean is given by;

                            Z  =  \frac{ \bar X-\mu}{\frac{\sigma}{\sqrt{n} }  } }  ~ N(0,1)

where, \mu = population mean diameter = 141 millimetres

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Now, Percentage the sample mean would be greater than 141.4 millimetres is given by = P(\bar X > 141.4 millimetres)

      P(\bar X > 141.4) = P( \frac{ \bar X-\mu}{\frac{\sigma}{\sqrt{n} }  } } > \frac{141.4-141}{\frac{7}{\sqrt{39} }  } } ) = P(Z > 0.36) = 1 - P(Z \leq 0.36)

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The above probability is calculated by looking at the value of x = 0.36 in the z table which has an area of 0.6406.

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3 years ago
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<u>a.</u><u> </u><u>7</u>

Hope you could understand.

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