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3 years ago

Which equation represents a line perpendicular to the x axis x=-4 y=x+2 y=2 y=x

Mathematics

2 answers:

ANEK [815]3 years ago

4 0

X=-4

No matter what ‘y’ is ‘x’ will always be -4, which will show as a vertical line, perpendicular to the x axis.

uranmaximum [27]3 years ago

3 0

Answer:

x = -4

Step-by-step explanation:

with x = -4 , a perpendicular line at -4 on the x axis reveals that x is alway -4...all the way along the perpendicular line. Y will be changing values as the perpendicular line goes up or down

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Mr.diaz’s class is taking a field trip to the science museum there are 23 students in the class and a student admission ticket i

PIT_PIT [208]

since there are 23 students and a ticket costs $8 for each you would:

23x8=184

the student's tickets cost $184 all together

hope this helps! :3

4 0

4 years ago

When rewriting in the form y=a(x-h)+k, by completing the square, the relation y=-x*2+6x+12 becomes:

ankoles [38]

Answer:

Step-by-step explanation:

you can complete the square or use a calculator online that does it for you.

the equation is in the for y = a(x-h)^2 + k

it should be y = (x + 3)^2 + 3

3 0

3 years ago

Read 2 more answers

PLEASE HELP! can anyone who answers this provide explanations and how to solve each and as well? ;-;

sergeinik [125]

Answer:

1) 6.32

2)8.66

3)5.74

4)9.49

5)16.55

6)21.21

7)25.98

Step-by-step explanation:

1) 6,7

2) 8,9

3) 5,6

4) 9,10

5) 16,17

6) 21,22

7) 25,26

8 0

4 years ago

The amount of coffee that a filling machine puts into an 8 dash ounce 8-ounce jar is normally distributed with a mean of 8.2 oun

Inessa [10]

Answer:

73.3% probability that the sampling error made in estimating the mean amount of coffee for all 8 dash ounce 8-ounce jars by the mean of a random sample of 100 jars, will be at most 0.02 ounce

Step-by-step explanation:

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

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes 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.

In this question, we have that:

$\mu = 8.2, \sigma = 0.18, n = 100, s = \frac{0.18}{\sqrt{100}} = 0.018$

What is the probability that the sampling error made in estimating the mean amount of coffee for all 8 dash ounce 8-ounce jars by the mean of a random sample of 100 jars, will be at most 0.02 ounce

That is, probability of the sample mean between 8.2-0.02 = 8.18 and 8.2 + 0.02 = 8.22, which is the pvalue of Z when X = 8.22 subtracted by the pvalue of Z when X = 8.18.

X = 8.22

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

By the Central Limit Theorem

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

$Z = \frac{8.22 - 8.2}{0.018}$

$Z = 1.11$

$Z = 1.11$ has a pvalue of 0.8665.

X = 8.18

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

$Z = \frac{8.18 - 8.2}{0.018}$

$Z = -1.11$

$Z = -1.11$ has a pvalue of 0.1335.

0.8665 - 0.1335 = 0.7330

73.3% probability that the sampling error made in estimating the mean amount of coffee for all 8 dash ounce 8-ounce jars by the mean of a random sample of 100 jars, will be at most 0.02 ounce

6 0

3 years ago

Help please i will give brainlist

Feliz [49]

Answer:

Angle 1 is 67 and Angle 2 is 46

Step-by-step explanation:

5 0

3 years ago