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3 years ago

Is the inequality below sometimes, always, or never true? -2(2x + 9) > -4x + 9

1 answer:

3 0

Expanding:-

-4x - 18 > -4x - 9
add 4x to both sides
-18 > -9

this is obviously untrue so this inequality is never true

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Is the number -243 an integer?

andreev551 [17]

Answer:

yes

Step-by-step explanation:

Yes it is because it is a whole number and rational

Please mark this as brainliest and I hope this helps you

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3 years ago

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Jamila has to purchase a new car and is putting 1 over 3

iris [78.8K]

I did the work and it's D. i believe

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4 years ago

Suppose the time it takes a barber to complete a haircuts is uniformly distributed between 8 and 22 minutes, inclusive. Let X =

salantis [7]

Answer:

$P(X>14)= 1-P(X$

And replacing we got:

$P(X>14)= 1- \frac{14-8}{22-8}= 0.5714$

The probability that a randomly selected barber needs at least 14 minutes to complete the haircut is 0.5714

Step-by-step explanation:

We define the random variable of interest as x " time it takes a barber to complete a haircuts" and we know that the distribution for X is given by:

$X \sim Unif (a= 8, b=22)$

And for this case we want to find the following probability:

$P(X>14)$

We can find this probability using the complement rule and the cumulative distribution function given by:

$P(X$

Using this formula we got:

$P(X>14)= 1-P(X$

And replacing we got:

$P(X>14)= 1- \frac{14-8}{22-8}= 0.5714$

The probability that a randomly selected barber needs at least 14 minutes to complete the haircut is 0.5714

6 0

3 years ago

Question 3 (5 points)

expeople1 [14]

Answer:

Parallel lines

Step-by-step explanation:

Parallel lines lie in the same plane but <em>never</em> intersect.

6 0

3 years ago

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Which is the slope of the line that passes through the points (4,2) and (6,7)

Anastasy [175]

The slope is 5/2. You can find the slope by using y2-y1/x2-x1. 7-2/6-4= 5/2.

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4 years ago