2 years ago

2x +2 -1x-(2x +1-1-2)

Mathematics

2 answers:

Strike441 [17]2 years ago

5 0

Answer:

-x+4

Step-by-step explanation:

I could be wrong.

Alenkinab [10]2 years ago

3 0

Answer:

− x +4

Step-by-step explanation:

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The commutative property works with subtraction. True or false

QveST [7]

True hope this helps

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2 years ago

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In a sample of 700 gas stations, the mean price for regular gasoline at the pump was $2.894 per gallon and the standard deviati

frez [133]

Answer:

$P(x < 2.892) = 4.36\%$

Step-by-step explanation:

Given

$N = 700$ --- Population

$\mu = 2.894$ -- Mean

$\sigma = 0.009$ --- Standard deviation

$n = 55$ -- Sample

Required: $P(x < 2.892)$

This question will be solved using the finite correction factor

First, calculated the z score

$z = \frac{x - \mu}{\sqrt{\frac{N -n}{N -1}} * \frac{\sigma}{\sqrt n}}$

$z = \frac{2.892 - 2.894}{\sqrt{\frac{700 -55}{700 -1}} * \frac{0.009}{\sqrt {55}}}$

$z = \frac{-0.002}{\sqrt{\frac{645}{699}} * \frac{0.009}{7.42}}$

$z = \frac{-0.002}{\sqrt{0.92} * \frac{0.009}{7.42}}$

$z = \frac{-0.002}{0.95917 * 0.0012129}$

$z = -1.71$

So:

$P(x < 2.892) = P(z < -1.71)$

Using z table

$P(x < 2.892) = 0.043633$

$P(x < 2.892) = 4.36\%$

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2 years ago

-3(y-5)=24 what is the value of y

Gemiola [76]

Step 1
distribute the -3
-3(y-5)=24
-3y+15=24
step 2
subtract 15 from both sides
-3y =9
Step 3
divide -3 on both sides
y=-3

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2 years ago

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omeli [17]

Answer:

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Step-by-step explanation:

This symbol is the summation symbol

It means to sum what comes after it

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mario62 [17]

Answer:

Mass of gold bar=13.896

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