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3 years ago

2. Find the solution set of the inequality:

Mathematics

1 answer:

m_a_m_a [10]3 years ago

8 0

Answer:

The answer is B

Step-by-step explanation:

I got a giid grade

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Which is the solution to the inequality y+15 <3?

Paraphin [41]

To solve an equation or inequality, you can add the same value to both sides of the expression. Here, it is convenient to choose that value to be the opposite of the constant (+15) added to y, so that constant is replaced by zero.

y + 15 - 15 < 3 - 15 . . . . . we have added -15 to both sides

y < -12 . . . . . . . . . . . . . . . the result of simplifying. This is your solution.

6 0

3 years ago

Help me please! thanksss

Fittoniya [83]

7:45 -1 hour=6:45

The concert started at 6:45

7:45+2 hours=9:45

The concert will be over at 9:45

The time outside the theater is

5:30a.m. or 5:30p.m.

It's most likely 5:30p.m. as 5:30a.m. is really early in the morning.

8 0

3 years ago

What are the solutions to 2(x-6)2 = 50 ?

yuradex [85]

Answer:

2(x-6)=50

x-6=50/2

x-6=25

x=31

4 0

3 years ago

Read 2 more answers

» Seven more than a number, 2, is at most 20.

lisabon 2012 [21]

Answer:

i believe its 7 + x < 20

Step-by-step explanation:

3 0

3 years ago

A sample of n = 4 scores is obtained from a population with a mean of 70 and a standard deviation of 8. If the sample mean corre

jeka57 [31]

Answer:

The value of the sample mean is 78.

Step-by-step explanation:

We are given that a sample of n = 4 scores is obtained from a population with a mean of 70 and a standard deviation of 8.

Also, the sample mean corresponds to a z score of 2.00.

Let $\bar X$ = sample mean

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

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

where, $\mu$ = population mean = 70

$\sigma$ = standard deviation = 8

n = sample size = 4

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

Now, we are given that the sample mean corresponds to a z score of 2.00 for which we have to find the value of sample mean;

So, z-score formula is given by ;

z-score = $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ = $\frac{\bar X-70}{\frac{8}{\sqrt{4} } }$

2.00 = $\frac{\bar X-70}{\frac{8}{\sqrt{4} } }$

2.00 = $\frac{\bar X-70}{4 } }$

$\bar X = 70+(2 \times 4)$

$\bar X$ = 70 + 8 = 78

Therefore, the value of the sample mean is 78.

3 0

3 years ago