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3 years ago

1.If x2 = 60, what is the value of x?

1 answer:

5 0

Q1, The answer is B. plus or minus the square root of 60

x² = 60
x = ?

Since a² = -√a or a² = +√a, then
x = -√60 or
x = +√60

Q2. The answer is C. 2.83 inches

The area of the square (A) with side s is:
A = s²
Since A = 8 in², then s² = 8 in²
s = √8 in²
s ≈ 2.828 in
s ≈ 2.83

Q3. The answer is D. plus or minus 11

x² = 121
x² = 11²
Since a² = -√a or a² = +√a, then
x = -√11² or x = +√11²
x = -11 or x = + 11

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A line that includes the points (-2,-7) and (-3, p) has a slope of -6. what is the value of p

MrRissso [65]

Answer:

p=-1

Step-by-step explanation:

y-y1=m(x-x1)

-7-p=-6(-2+3)

-7-p=-6

-p=1

p=-1

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3 years ago

30 PTS AND BRAINLEST FOR WHOEVER DOES ALL QUESTIONS IN PICTURE

LuckyWell [14K]

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2 years ago

In Applied Life Data Analysis (Wiley, 1982), Wayne Nelson presents the breakdown time of an insulating fluid between electrodes

ale4655 [162]

Answer:

The sample mean is $\bar{x}=14.371$ min.

The sample standard deviation is $\sigma = 18.889$ min.

Step-by-step explanation:

We have the following data set:

$\begin{array}{cccccccc}0.15&0.82&0.81&1.44&2.70&3.28&4.00&4.70\\4.96&6.49&7.25&8.03&8.40&12.15&31.89&32.47\\33.79&36.80&72.92&&&&&\end{array}$

The mean of a data set is commonly known as the average. You find the mean by taking the sum of all the data values and dividing that sum by the total number of data values.

The formula for the mean of a sample is

$\bar{x} = \frac{{\sum}x}{n}$

where, $n$ is the number of values in the data set.

$\bar{x}=\frac{0.15+0.82+0.81+1.44+2.7+3.28+4+4.7+4.96+6.49+7.25+8.03+8.4+12.15+31.89+32.47+33.79+36.80+72.92}{19}\\\\\bar{x}=14.371$

The standard deviation measures how close the set of data is to the mean value of the data set. If data set have high standard deviation than the values are spread out very much. If data set have small standard deviation the data points are very close to the mean.

To find standard deviation we use the following formula

$\sigma = \sqrt{ \frac{ \sum{\left(x_i - \overline{x}\right)^2 }}{n-1} }$

The mean of a sample is $\bar{x}=14.371$ .

Create the below table.

Find the sum of numbers in the last column to get.

$\sum{\left(x_i - \overline{X}\right)^2} = 6422.0982$

$\sigma = \sqrt{ \frac{ \sum{\left(x_i - \overline{x}\right)^2 }}{n-1} } = \sqrt{ \frac{ 6422.0982 }{ 19 - 1} } \approx 18.889$

7 0

3 years ago

jodi walks 35 minutes a day if she walks for 240 days ,how many minutes altogether does jodi walk ??????

Ann [662]

To answer that question, you need to multiply 35 minutes × 240 days.

So:
35
× 240
_________
8400 minutes,

So Jodi walked a total of 8400 minutes

I hope this helped :)

8 0

3 years ago

Please help im on dead line

Serjik [45]

Answer: C

Step-by-step explanation:

It is C because you are adding money to something you already have, hence positive integer

8 0

2 years ago