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ololo11 [35]
3 years ago
5

Please help me!! ASAP

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
8 0
I will answer left to right row by row

row 1: 1 square unit ; 6 square units; 1 cubic unit; 6; 6 to 1
row 2: 4 square units; 24 square units; 8 cubic units; 3; 3 to 1
row 3: 9 square units; 54 square units; 27 cubic units; 2; 2 to 1
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Alexxx [7]
The length of somebody's arm depends on the person. Not everyone has the same length of arm.

4 0
4 years ago
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Find the sum of these polynomials
Nuetrik [128]
Hi there! The answer is B.

( {x}^{2}  - x + 7) + (9 {x}^{2}  + 6)
First we work out the parenthesis, which is easy because we can just remove them.

{x}^{2}  - x + 7 + 9 {x}^{2}  + 6
Now rearrange our expression (in order to collect terms later).

{x}^{2}  + 9 {x}^{2}  - x + 7 + 6
Next up is collecting the terms.

10 {x}^{2}  - x  + 13
The answer is B.

~ Hope this helps you!



7 0
3 years ago
Fill in the blank. In a drive thru performance study, the average service time for McDonald's is 203.21 seconds with a standard
Alenkasestr [34]

Answer:

5) 203.35

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value 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. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

The average service time for McDonald's is 203.21 seconds with a standard deviation of 5.67 seconds.

This means that \mu = 203.21, \sigma = 5.67

Sample of 90

This means that n = 90, s = \frac{5.67}{\sqrt{90}} = 0.59767

There is a 51% chance that the average drive-thru service time is less than ________ seconds.

X when Z is in the 51st percentile, that is, has a p-value of 0.51, so X when Z = 0.025.

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

0.025 = \frac{X - 203.21}{0.59767}

X - 203.32 = 0.025*0.59767

X = 203.35

203.35 seconds.

3 0
3 years ago
What's the equation of the line that's a perpendicular bisector of the segment connecting C (6, –12) and D (10, –8)? ANSWERS: A)
zavuch27 [327]

Answer:

B) y = x + 2

Step-by-step explanation:

Coordinates of point C =(x_1,y_1)=(6,-12)

Coordinates of point D=(x_2,y_2)=(10,-8)

To find the equation of segment CD

Formula : y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

Substitute the values in the formula :

y-12=\frac{-8+12}{10-6}(x-6)

y-12=x-6

y=x+6

When two lines are perpendicular to each other the product of their slopes is -1

Let the slope of perpendicular line be x

So, -1 \times x = -1

So, x =1

General equation : y = mx+c

So, Option B has slope = 1

So,the equation of the line that's a perpendicular bisector of the segment connecting C (6, –12) and D (10, –8) is  y = x + 2

5 0
3 years ago
Explain why 4/10 ÷ 2 and 4/10 × 1/2 both equal 2/10
antoniya [11.8K]

They are both equal to 2/10 because 4/10 divided by 2 is the same as 4/10 x 1/2

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