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GuDViN [60]
3 years ago
12

This is due by today, someone help me please!

Mathematics
1 answer:
kaheart [24]3 years ago
7 0
720 might be the answer
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What is (12 − 4) − (6 ÷ 2) − (2 x 2) =
Tanya [424]

Answer:

1

Step-by-step explanation:

(12-4) - (6/2) - (2 x 2)

(8) - (3) - (4)

1

First you solve the expressions in the perenthesis, then solve the final part

Hope this helps!

:)

5 0
2 years ago
What decimal is 1/10 of 0.08
Luden [163]
The answer is .008

Ok so lets explain this with an easier number like 1.

1 times 1/10 is 1/10 or in decimals its .1

So the decimal just got moved further back. Same thing happens with any number.

Brainliest if this helps you out?
5 0
3 years ago
What is the value of fraction 1 over 2x3 + 5.2y when x = 2 and y = 3?
mihalych1998 [28]
I think is 1/27.6 because 2x equals 4 and times 3 equals 12. 5.2y equals 15.6. Then 15.6 plus 12 equals 27.6.
4 0
3 years ago
A manufacturer produces light bulbs that have a mean life of at least 500 hours when the production process is working properly.
denpristay [2]

Answer:

We conclude that the population mean light bulb life is at least 500 hours at the significance level of 0.01.

Step-by-step explanation:

We are given that a manufacturer produces light bulbs that have a mean life of at least 500 hours when the production process is working properly. The population standard deviation is 50 hours and the light bulb life is normally distributed.

You select a sample of 100 light bulbs and find mean bulb life is 490 hours.

Let \mu = <u><em>population mean light bulb life.</em></u>

So, Null Hypothesis, H_0 : \mu \geq 500 hours      {means that the population mean light bulb life is at least 500 hours}

Alternate Hypothesis, H_A : \mu < 500 hours     {means that the population mean light bulb life is below 500 hours}

The test statistics that would be used here <u>One-sample z test statistics</u> as we know about the population standard deviation;

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

where, \bar X = sample mean bulb life = 490 hours

           σ = population standard deviation = 50 hours

           n = sample of light bulbs = 100

So, <u><em>the test statistics</em></u>  =  \frac{490-500}{\frac{50}{\sqrt{100} } }

                                     =  -2

The value of z test statistics is -2.

<u>Now, at 0.01 significance level the z table gives critical value of -2.33 for left-tailed test.</u>

Since our test statistic is higher than the critical value of z as -2 > -2.33, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which <u>we fail to reject our null hypothesis.</u>

Therefore, we conclude that the population mean light bulb life is at least 500 hours.

7 0
3 years ago
What is 7/9 - 5/18 lowest common denominator
NISA [10]
7/9 = 14/18
14-5=9
9/18=1/2
6 0
3 years ago
Read 2 more answers
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