Someone help me please, 25 points

Im trying to do IXL and I dont understand the way my teacher teaches (ironic right?)

Anastaziya [24]

Answer:

Step-by-step explanation:

4 0

3 years ago

Rosa says that to find how many tortillas she can fill, she first finds find how many 1/3 cups are in 8 cups. What else must Ros

Kamila [148]

She can divide the 8 cups by the 1/3 cups

Step-by-step explanation:

The next step will be to divide 8 cups by 1/3 cups

This will be:

= 8÷1/3

=8*3/1-------------dividing by a fraction is the same as multiplying by its reciprocal

= 24

There are 24 1/3cups in 8 cups.

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3 0

3 years ago

Read 2 more answers

A student wants to determine if different types of soil, A and B, affect the propagation of African violets. One hundred leaves

Nana76 [90]

It is A and B it makes more sense

8 0

2 years ago

Read 2 more answers

A random variable x has a Normal distribution with an unknown mean and a standard deviation of 12. Suppose that we take a random

Zielflug [23.3K]

Answer: The 95% confidence interval for the mean of x is (94.08, 101.92) .

Step-by-step explanation:

We are given that ,

A random variable x has a Normal distribution with an unknown mean and a standard deviation of 12.

i.e. $\sigma= 12$

Also, it is given that , Sample mean $\overline{x}=98$ having sample size : n= 36

For 95% confidence ,

Significance level : $\alpha=1-0.95=0.05$

By using the z-value table , the two-tailed critical value for 95% Confidence interval :

$z_{\alpha/2}=z_{0.025}=1.96$

We know that the confidence interval for unknown population mean $(\mu)$ is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

, where $\overline{x}$ = Sample mean

$\sigma$ = Population standard deviation

$z_{\alpha/2}$ = Critical z-value.

Substitute all the given values, then the required confidence interval will be :

$98\pm (1.96)\dfrac{12}{\sqrt{36}}$

$=98\pm (1.96)\dfrac{12}{6}$

$=98\pm (1.96)(2)$

$=98\pm 3.92=(98-3.92,\ 98+3.92)\\\\=( 94.08,\ 101.92)$

Therefore, the 95% confidence interval for the mean of x is (94.08, 101.92) .

6 0

3 years ago

Adam is in mexico where the temperature is given degrees celsius . To convert to fahrenheit you multiply the celsius temperature

Anestetic [448]

Answer:

When temperature is 30 in degrees Celsius then temperature in degree Fahrenheit is 86.

Step-by-step explanation:

Let C denotes the temperature in degree Celsius and F denotes the temperature in degree Fahrenheit.

According to the given question,

To convert to Fahrenheit we multiply the Celsius temperature by 9/5 and add 32.

Mathematically it can be written as,

$F=C\times\frac{9}{5}+32$

For example , let us take the temperature in mexico to be 30 degrees Celsius to convert the temperature to Fahrenheit we can use this equation as ,

$F=C\times\frac{9}{5}+32$

Put C = 30, we get

$\Rightarrow F=30\times\frac{9}{5}+32$

$\Rightarrow F=6 \times 9+32$

$\Rightarrow F=54+32$

$\Rightarrow F=86$

Thus, when temperature is 30 in degrees Celsius then temperature in degree Fahrenheit is 86.

4 0

3 years ago