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3 years ago

What is the constant rate of change? A 2 B 4 C 1/2 D -2

Mathematics

2 answers:

timofeeve [1]3 years ago

7 0

It would be c because that would be your slope to get from the first bottom point to the next point which would be (5,-2) and the so on so forth

erica [24]3 years ago

7 0

Answer:

C- 1/2

Step-by-step explanation:

the graph shows a line that goes up 1 square, and to the right 2 squares. Put x over y and you get 1/2, your answer.

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What is the unit price for 12 apples for $3.12?

horsena [70]

Answer:

$3.85? 12/3.12 = $3.85

The answer would have came out of 3.84615384615

Then round up the answer to 3.85. So the unit price is $3.85.

7 0

3 years ago

Of the 50 people who started a math class meeting at 10:00 each morning, only 37 finished the class. What fraction of people fin

saveliy_v [14]

Answer:

37/50

Step-by-step explanation:

So 37 out of 50 who finished the class, so 37/50 .

And you can't simplify it.

6 0

3 years ago

A urn contains 8 balls 4 orange 3 red and 1 green . Two are selected without replacement

Orlov [11]

Answer:

0.25

Step-by-step explanation:

Since, in the question , it is not mentioned that two balls of any specific colour,

the probability of getting two balls is: $\frac{2}{8}\\= \frac{1}{4}$

4 0

3 years ago

The amount that households pay service providers for access to the Internet varies quite a bit, but the mean monthly fee is $50

Natali5045456 [20]

Answer:

(a) See Explanation

(b) $\bar x =50$ and $\sigma_x = 0.8944$

(d) $P(\bar x > 55) = 0$

Step-by-step explanation:

Given

$\mu = \$50$ -- mean

$\sigma = \$20$ --- standard deviation

$n=500$ --- sample size

Solving (a): The reason we can't determine the probability that an amount to access internet by a household will exceed $55.

The question says that a lot of households pay low rates, but the percentage of the households in this category is not given. This means that it is impossible to determine the shape of the distribution.

Hence, the probability cannot be calculated.

Solving (b): Sample mean and Sample standard deviation

The sample mean estimates the population mean

So:

$\bar x =\mu$

$\bar x =50$

The sample standard deviation is calculated as thus:

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{20}{\sqrt{500}}$

$\sigma_x = \frac{20}{22.36}$

$\sigma_x = 0.8944$

Solving (c): The shape of the distribution.

We have:

$n = 500$ --- The sample size

According to Central limit theorem, When the sample size is greater than 30, then the shape of the distribution is normal.

<em>Hence, the shape is normal</em>

Solving (d): $P(\bar x \ge 55)$

Calculate the test statistic (t)

$t = \frac{\bar x - \mu}{\sigma}$

$t = \frac{55 - 50}{0.8945}$

$t = \frac{5}{0.8945}$

$t = 5.590$

So:

$P(\bar x > 55) = P(t > 5.590)$

Referencing the z table, we have:

$P(t > 5.590) = 0$

Hence:

$P(\bar x > 55) = 0$

5 0

3 years ago

<img src="https://tex.z-dn.net/?f=3%5Csqrt%7B5%7D" id="TexFormula1" title="3\sqrt{5}" alt="3\sqrt{5}" align="absmiddle" class="l

adoni [48]

Answer:

3/5???

Step-by-step explanation:

6 0

3 years ago