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3 years ago

TIS IS TIMEDDD PLS ANSWER WILL GIVE BRAINLISTTTTT......

Mathematics

1 answer:

DedPeter [7]3 years ago

3 0

Answer: well, just multiply x and y by the scale factor

Step-by-step explanation:A square with a perimeter of 20 units is graphed on a coordinate grid. The square is dilated by a scale factor

of 0.4 with the origin as the center of dilation.

If (x, y) represents the location of any point on the original square, which ordered pair represents the

coordinates of the corresponding point on the resulting square.

GIVE ME DA BRAINS

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Lina20 [59]

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3 years ago

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Please HELP D: what are the Angels of A,B,C,D

zaharov [31]

A is 115 - because you minus 65 from 180 since it is a straight line and equals 180

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3 years ago

Determine which point is the solution to the given system. y= -7/2 x + 32 y= 4/5 x -11

taurus [48]

Answer:

(10, -3)

Step-by-step explanation:

$-\frac{7}{2}x+32=\frac{4}{5}x-11 \\ \\ -35x+320=8x-110 \\ \\ -43x=-430 \\ \\ x=10 \\ \\ \therefore y=-\frac{7}{2}(10)+32=-3$

7 0

1 year ago

A coffee machine dispenses normally distributed amounts of coffee with a mean of 12 ounces and a standard deviation of 0.2 ounce

NemiM [27]

Answer:

0.9332 = 93.32% probability that the mean of the sample will be less than 12.1 ounces.

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 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.

Mean of 12 ounces and a standard deviation of 0.2 ounces.

This means that $\mu = 12, \sigma = 0.2$

Sample of 9:

This means that $n = 9, s = \frac{0.2}{\sqrt{9}}$

Find the probability that the mean of the sample will be less than 12.1 ounces.

This is the pvalue of Z when X = 12.1. So

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

By the Central Limit Theorem

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

$Z = \frac{12.1 - 12}{\frac{0.2}{\sqrt{9}}}$

$Z = 1.5$

$Z = 1.5$ has a pvalue of 0.9332

0.9332 = 93.32% probability that the mean of the sample will be less than 12.1 ounces.

6 0

3 years ago

Please help!

lidiya [134]

Let’s start out by breaking down the equation

1. eight more than. we know this must mean we are adding 8, so (+ 8)

2. the difference of a number and sixteen. we know the number (x) and 16 are being subtracting as indicated by the word difference, so (x-16)

now let’s combine them (x-16) + 8

let’s set it equal to 0, just to confirm it is correct.
(x-16) +8 = 0
x-16 = -8
x = 8

so substituting x for 8 in the translation: (8-16) + 8 = 0
-8 +8=0

it is correct! :)

6 0

4 years ago