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3 years ago

What is the length of PR?

Mathematics

2 answers:

lorasvet [3.4K]3 years ago

5 0

<h3>here,</h3><h3> 7=21</h3><h3> 7=thrice of 7=21</h3><h3>so, </h3><h3> 3x=27</h3><h3> x=27/3</h3><h3> x=9</h3><h3> PR=9</h3>

<h3>Hope it helped :-)</h3>

defon3 years ago

3 0

Answer:

PR is 9 units long.

Step-by-step explanation:

You can see that triangle YXZ and QPR are similar because they have 2 angles in common. This means that they have a scale factor between them. The scale factor between triangle YXZ and QPR happens to be 1/3, as you can see, side QP is 1/3 times of corresponding side YX. To find PR, you just need to check how long its corresponding side is. XZ is 27 units long, and 1/3 of 27 is 9 units.

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timurjin [86]

Answer:

x = 28,000

Step-by-step explanation:

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Our equation, then, is

x = .70(40,000) so

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3 years ago

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Factor completely.<br> x² - 3x² - 4

Ber [7]

Answer:

-2(x^2+2)

Step-by-step explanation:

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2 years ago

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Idk wat to do.....<br>........

oksano4ka [1.4K]

Answer:

Mean : 95

Median : 85

Mode : 90

Part B : Impossible

Step-by-step explanation:

We can make an equation to find the mean using the first 5 history test scores.

$85=\frac{80+75+90+75+95+n}{6} \\ \\ 85=\frac{415+n}{6} \\ \\ 510=415+n \\ \\ n=95$

So a 95 would be needed to have a mean of 85.

Next, the median.

First, we sort the first 5 history scores from least to greatest.

We get 75, 75, 80, 90, 95.

Since, 80 is the middle value, it will be used in the calculation of the median.

We can make an equation with this.

$82.5=\frac{80+n}{2} \\ \\ 165=80+n \\ \\ n=85$

So a score a 85 would be needed to have a median of 82.5

Thirdly, the mode.

Since 90 is already in the set once, we can just have Maliah score another 90 to make 90 the mode (with the exception of 75 of course).

Finally, Part B.

We can use the equation we had for the first mean calculation but change 85 to 90.

$90=\frac{80+75+90+75+95+n}{6} \\ \\ 90=\frac{415+n}{6} \\ \\ 540=415+n \\ \\ n=125$

So Maliah would need a score of 125 to make her mean score 90, but since the range is only from 0-100, it is impossible.

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3 years ago

alex wants to buy the same number of stamps and envelopes dancer sold in packs of 14 and envelopes are sold and packs of 10 what

lianna [129]

5 packs of stamps and 7 packs of envelopes. There will be a total of 70 envelopes and stamps.

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3 years ago

E^(i.π)+2^(-2+3-1)+21899921030

Anna007 [38]

Answer:

21899921030

Step-by-step explanation:

e^(i.π) = -1

2^(-2+3-1) = 2^0 = 1

Therefor

-1 + 1 + 21899921030 = 21899921030

5 0

2 years ago