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3 years ago

The difference of r and 3 (what is an algebraic expression for the word phrase)

2 answers:

4 0

Hi!

Whenever we say 'the difference', it means subtraction. So, the difference of r and 3 is equal to <em>r - 3.

</em>Hopefully, this helps! =)<em>
</em>

Juli2301 [7.4K]3 years ago

3 0

The answer is r-3 or 3-r

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On Monday, Elsbeth’s bank account balance was -$16.75. On Tuesday, she deposited a check for $5.72. On Thursday, she deposited $

koban [17]

Answer:

5.72

Step-by-step explanation:

(-16.75 + 16.75) = 0

0 + 5.72= 5.72

Therefore, the answer is 5.72

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3 years ago

Whats the slope of the coordinates (-3, 1 ) and (2, -2)?

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3 years ago

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Find the values of x and y

PSYCHO15rus [73]

Hi there!

So you're looking at an equilateral triangle, which is a big word that basically means all three sides are equal and all three angles are 60°.

Knowing that, the mesure of one side is 7, so necessarily the side "x" is also equal to 7.

So the value of x is : 7

And since all angles are of 60°, necessarily the angle "y" has an angle of 60°.

So the value of y° is : 60°

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3 years ago

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Final exam scores are normally distributed with a mean of 74 and a standard deviation of 6. Approximately, what percentage of fi

notka56 [123]

Answer:

81.86%

Step-by-step explanation:

We have been given that final exam scores are normally distributed with a mean of 74 and a standard deviation of 6.

First of all we will find z-score using z-score formula.

$z=\frac{x-\mu}{\sigma}$

$z=\frac{68-74}{6}$

$z=\frac{-6}{6}=-1$

Now let us find z-score for 86.

$z=\frac{86-74}{6}$

$z=\frac{12}{6}=2$

Now we will find P(-1<Z) which is probability that a random score would be greater than 68. We will find P(2>Z) which is probability that a random score would be less than 86.

Using normal distribution table we will get,

$P(-1$