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2 years ago

If p =-2 ,q= -1 and r=3 find the value of . -(1), p ²+ q²- r²

Mathematics

1 answer:

sammy [17]2 years ago

8 0

Answer:

Step-by-step explanation:

$(-2)^{2} + (-1)^{2} - (3^{2} )\\4 + 1 -9\\-4$

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raketka [301]

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Step-by-step explanation:

25 = x

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4+5+x=12.5

x = 3.5

3 0

2 years ago

This should be a very simple question on interior angles adding up to 180º, however, I'm continuously getting it wrong. Help!

myrzilka [38]

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58°

Step-by-step explanation:

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2 years ago

suppose the nightly rate for a three star hotel in paris is thought to be bell-shaped and symmetrical with a mean of 160 euros a

Westkost [7]

Answer:

95.44%

Step-by-step explanation:

Mean rate (μ) = 160 euros

Standard deviation (σ) = 8 euros

For any given rate, X, the z-score is:

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For X = 144 euros:

$z=\frac{144-160}{8}\\ z=-2$

For X= 176 euros

$z=\frac{176-160}{8}\\ z=2$

In a standard distribution, a z-score of -2 corresponds to the 2.28th percentile, while a z-score of 2 corresponds to the 97.72th percentile.

Therefore, the percentage of hotels with rates between 144 and 176 euros is:

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3 years ago

Line m passes through point (2,-7) and (4,-9). Line m is parallel to which line?

Reil [10]

As the slope is -1, so any line that has the same slope is parallel.

<u>Solution:</u>

Given points (2, -7) and (4, -9) find the slope, m:

$m = \frac{y - y_1}{x - x_1}$

$\Rightarrow m = \frac{-7 - (-9)}{2 - 4}$

$m = \frac{-7 + 9}{-2}$

$m = \frac{2}{-2}=-1$

Any line that has the same slope is parallel.

5 0

3 years ago

How do you solve this kind of equation? 9(x+2) > 9(x-3)

GalinKa [24]

Step-by-step explanation:

okay so that's an inequality. You solve it the same way you saw the regular equation. the only difference is that if you divide or multiply by a negative number then you have to turn the sign around.

6 0

3 years ago

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If p =-2 ,q= -1 and r=3 find the value of . -(1), p ²+ q²- r²​

If p =-2 ,q= -1 and r=3 find the value of . -(1), p ²+ q²- r²