3 years ago

Please; Ignore the background.

Mathematics

2 answers:

melisa1 [442]3 years ago

7 0

Answer:

x= -3 1/2x= -3 1/2

Step-by-step explanation:

Nookie1986 [14]3 years ago

4 0

Answer:

x= -3 1/2x= -3 1/2

Step-by-step explanation:

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A combination lock requires a user to select three numbers to unlock it, where all three numbers are between 1 to 30, inclusive,

Sonbull [250]

Answer:

$\frac{1}{270}=0.00370$

Step-by-step explanation:

As the numbers are only between 1 and 30

Total number of possible combinations = 30×30×30 = 27000

If there are 100 attempts then

$\text{P (someone guesses correct)}=\frac{\text{Number of attempts}}{\text{Total number of possible combinations}}\\\Rightarrow \text{P (someone guesses correct)}=\frac{100}{27000}\\\Rightarrow \text{P (someone guesses correct)}=\frac{1}{270}=0.00370$

∴ Probability someone can guess the correct combination given 100 attempts is $\mathbf{\frac{1}{270}=0.00370}$

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Gre4nikov [31]

This works out beautifully. You COULD use long division here, but since your numerator is a quadratic, your first instinct should be to try and factor it. If you factor it, it works out to be (x - 3)(x + 2). Now it just so happens that when you do that, the (x - 3) in the numerator will cancel with the (x - 3) in the denominator leaving you with one sad and lonely (x + 2) as your answer.

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2 years ago

A prepaid phone card has a balance of $22.40 remaining. If calls are $0.035 per minute, which equation represents the number of

Jobisdone [24]

Answer:

0.035m = 22.40

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2 years ago

Which is the equation of the line that has a slope of 1/2

aleksley [76]

Answer:

y=1/2x-2