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Natalka [10]
2 years ago
5

The perimeter of the rectangle is 28 units.

Mathematics
1 answer:
kakasveta [241]2 years ago
8 0

Answer:

5 units

Step-by-step explanation:

P= 2 (l + w) = 2 x (9 + 5) = 28

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I need help with this.
anyanavicka [17]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
Add an intersection the red light times normally distributed by the mean of three minutes and a standard deviation of .25 minute
Soloha48 [4]

95% of red lights last between 2.5 and 3.5 minutes.

<u>Step-by-step explanation:</u>

In this case,

  • The mean M is 3 and
  • The standard deviation SD is given as 0.25

Assume the bell shaped graph of normal distribution,

The center of the graph is mean which is 3 minutes.

We move one space to the right side of mean ⇒ M + SD

⇒ 3+0.25 = 3.25 minutes.

Again we move one more space to the right of mean ⇒ M + 2SD

⇒ 3 + (0.25×2) = 3.5 minutes.

Similarly,

Move one space to the left side of mean ⇒ M - SD

⇒ 3-0.25 = 2.75 minutes.

Again we move one more space to the left of mean ⇒ M - 2SD

⇒ 3 - (0.25×2) =2.5 minutes.

The questions asks to approximately what percent of red lights last between 2.5 and 3.5 minutes.

Notice 2.5 and 3.5 fall within 2 standard deviations, and that 95% of the data is within 2 standard deviations. (Refer to bell-shaped graph)

Therefore, the percent of  red lights that last between 2.5 and 3.5 minutes is 95%

8 0
3 years ago
Please help me solve this !<br> will mark brainliest !<br> (spammers reported)
lions [1.4K]

Answer

-10

Step-by-step explanation:

-8w-7=9

add 7 to both sides

-8w=16

divide by negative 8 on both sides

w=-2

w-8=-10

3 0
3 years ago
Read 2 more answers
√2+1<br> b) Rationalize the denominator:<br> √2+1
Misha Larkins [42]

Answer:

there is not a complete question here ...

\sqrt{2} +1 is not in a denominator to rationalize

if it were you would multiply the rational expression (the fraction)

by \frac{\sqrt{2} -1}{\sqrt{2} -1} the result (in the denominator would end up being "2 -1"

which is 1

Step-by-step explanation:

4 0
2 years ago
Hi ill give points answer me now bye
Usimov [2.4K]
Can you pls brainlest me I need it so much
5 0
2 years ago
Read 2 more answers
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