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wolverine [178]

2 years ago

7

Caroline was thinking of a number. Caroline halves the number and gets 7.3. Form an equation with x from the information.

1 answer:

Damm [24]2 years ago

6 0

Answer:

The equation is: $\frac{x}{2} = 7.3$

Step-by-step explanation:

Caroline was thinking of a number.

We are going to call this number x.

Caroline halves the number and gets 7.3.

To find half of a number, we multiply by 1/2. So

$\frac{1}{2} \times x = 7.3$

$\frac{x}{2} = 7.3$

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School rules permit no fewer than 2 teachers per 25 students. There are at least 245 students enrolled in the school. If x repre

NISA [10]

First, let's write down this inequality:
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y≥245

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x≥2*(y/25)
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6 0

3 years ago

Read 2 more answers

Multiplying two digits<br>

Vika [28.1K]

Answer:

Get a calculator

Step-by-step explanation:

Most of the time for simple math like multiplying 2 digits, it is easiest if you just get a calculator. It saves a lot of time.

If you can't get a calculator then i recommend memorizing some common equations.

For example 10*15= 150

so that if you get 12*15=?, you can easily just add two extra 15's to your answer of 150.

15+15 is 30, and 30+150(from 10*15)=180.

Therefore 12*15=180.

:) Hope that helped!

4 0

2 years ago

Suppose that lithium calculator battery with a charge of 3 volts, actually has a voltage with uniform distribution between 2.93

Dmitrij [34]

Answer:

b. E(X) = 3.015, STDEV(X)= 0.049, P (X ≤ 2.98) = 0.2941

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The mean of the uniform probability distribution is:

$M = \frac{a + b}{2}$

The standard deviation of the uniform distribution is:

$S = \sqrt{\frac{(b-a)^{2}}{12}}$

The probability that we find a value X lower than x is given by the following formula.

$P(X \leq x) = \frac{x - a}{b-a}$

Uniform distribution between 2.93 and 3.1 volts

This means that $a = 2.93, b = 3.1$ . So

Mean:

$M = \frac{2.93 + 3.1}{2} = 3.015$

Standard deviation:

$S = \sqrt{\frac{(3.1 - 2.93)^{2}}{12}} = 0.049$

What is the probability that a battery has a voltage less than 2.98?

$P(X \leq 2.98) = \frac{2.98 - 2.93}{3.1 - 2.93} = 0.2941$

So the correct answer is:

b. E(X) = 3.015, STDEV(X)= 0.049, P (X ≤ 2.98) = 0.2941

6 0

2 years ago

A clydesdale drinkes about 120 gallons of water 4 days.At this rate about how much many gallons of water does a clydesdale drink

Margarita [4]

Gallons of water drank in 4 days = 120
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8 0

3 years ago

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IRINA_888 [86]

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3 0

3 years ago

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