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2 years ago

Need help please help me

Mathematics

1 answer:

castortr0y [4]2 years ago

8 0

Answer:

9-8 = 1 and 7 times 2 = 14

Step-by-step explanation:

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Which of the following fractions is greater than -4/5 but less than -3/4

choli [55]

Answer:

B. -19/25

Step-by-step explanation:

You are looking for an answer that is greater than -4/5 (which is equal to -0.80) but less than -3/4 (which is equal to -0.75). So, you can easily convert the fractions to decimals by dividing.

-33/50 = -0.66, which is greater than -0.75, so it can be eliminated.

-19/25 = -0.76, which fits our parameters, so it is the answer.

-19/20 = -0.95, which is less than -0.80, so it can be eliminated.

-7/10 = -0.70, which is greater than -0.75, so it can be eliminated.

7 0

3 years ago

What is 100000000 plus 1234342343

Zielflug [23.3K]

Answer:

1,334,342,343 I think

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3 years ago

Need help asap What is 2/3 divided by 1/6 ? A)3 B)4 C)4 1/12 D)4 1/2

Anastaziya [24]

The answer is for this mathematical equation is: B)4

7 0

2 years ago

Read 2 more answers

Evaluate n/6+2 when n =12

Shalnov [3]

Answer:

Step-by-step explanation:

n/6+2

Let n = 12

12/6 +2

Division first

2 +2

7 0

3 years ago

Read 2 more answers

.11 A machine produces metal pieces that are cylindrical in shape. A sample of pieces is taken, and the diameters are found to b

Troyanec [42]

Answer:

The 99% confidence interval for the mean diameter of pieces from this machine is between 0.93 and 1.07.

Step-by-step explanation:

Sample mean:

Sum of all values divided by the number of values. So

$M = \frac{1.01+0.97+1.03+1.04+0.99+0.98+0.99+1.01+1.03}{9} = 1$

Sample standard deviation:

Square root of the sum of the differences between each value and the mean, divided by the 1 less than the sample size. So

$s = \sqrt{\frac{(1.01-1)^2+(0.97-1)^2+(1.03-1)^2+(1.04-1)^2+(0.99-1)^2+(0.98-1)^2+(0.99-1)^2+(1.01-1)^2+(1.03-1)^2}{8}} = 0.0657$

Confidence interval:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 9 - 1 = 8

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 8 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.99}{2} = 0.995$ . So we have T = 3.355

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 3.355\frac{0.0657}{\sqrt{9}} = 0.07$

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 1 - 0.07 = 0.93

The upper end of the interval is the sample mean added to M. So it is 1 + 0.07 = 1.07

The 99% confidence interval for the mean diameter of pieces from this machine is between 0.93 and 1.07.

7 0

2 years ago