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3 years ago

What should be added to 4/5 to get -3/2

Mathematics

1 answer:

JulijaS [17]3 years ago

5 0

Answer:

x = - 23/10

x = - 2 3/10

Step-by-step explanation:

Hi there !

4/5 + x = - 3/2

x = - ⁵⁾3/2 - ²⁾4/5

x = - 15/10 - 8/10

x = (- 15 - 8)/10

x = - (15 + 8)/10

x = - 23/10

x = - 2 3/10

Good luck !

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just olya [345]

Answer:

2 is the answer I did this once in class

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2 years ago

A data set includes 103 body temperatures of healthy adult humans having a mean of 98.1degreesf and a standard deviation of 0.56

Karolina [17]

Answer:

The 99% confidence interval estimate for the mean is 97.9576 ≤ μ ≤ 98.246

A) This suggests that the mean body temperature could very possibly be 98.6 °F

Step-by-step explanation:

The number of body temperatures, n = 103

The mean body temperature, $\bar x$ = 98.1

The standard deviation, s = 0.56

Confidence interval required = 99%

Confidence interval, CI is given by

$CI=\bar{x}\pm z\frac{s}{\sqrt{n}}$

Plugging in the values we get;

z = 2.56 at 99%

$CI=98.1}\pm 2.56\times \frac{0.56}{\sqrt{103}}$

Therefore, we have

$\mu_{min} = 97.9579 , \ \mu_{max} = 98.242$ ,

The statistical result suggest that at 99% confidence level, the sample mean temperature is likely to be 98.1 °F

4 0

3 years ago

What percent of $30 is $7.50?

Nady [450]

Answer:

25%

Step-by-step explanation:

15 is 50% 7.5+7.5= 15=50% =25%+25%

3 0

3 years ago

Which is the recommended method for reading your math textbook most effectively? a. read, question, summarize, practice b. highl

Damm [24]

Answer: a. read, question, summarize, practice

Step-by-step explanation:

This may be subjective, but the most efficient method usually is:

> Read:

Obviously the first step is read, if there is something that you do not understand, keep reading (but take note of all the things that you don't understand), is important that you have a complete overview on the topic that you are studying

> Question:

Now is time to ask about the things that you did not understand in the first read, always when you do not fully understand something, is a good habit to ask about it, this is the best and easiest way to learn.

> Summarize:

Now that you understand all the text (or at least most of it) is the moment to summarize your new knowledge: Write all the new equations that you learned, also write for what they are for, when they can be useful, etc.

This is what you will use to solve exercises, so you should be clear when writing.

> Practice:

This is one of the most important parts, here is where you put in practice your new knowledge. Here you may find some problematic situations where you need to be inventive with your equations, which will allow you to learn new ways to use your equations, so this is a really important step.

So the correct option is A.

4 0

4 years ago

In a map scale of 2.5 cm : 400 m, the distance between the supermarket and the gas station is 5.5 cm. Work out the real distance

Marianna [84]

Answer:

880m

Step-by-step explanation:

2.5cm = 400m

1cm = 400/2.5

=160m

5.5cm = 160 × 5.5

=880m

7 0

3 years ago