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user100 [1]
4 years ago
12

3/8 = r + 2/3 I really need help I don't get it!!

Mathematics
2 answers:
makkiz [27]4 years ago
7 0
-7/24 is the correct answer.
liberstina [14]4 years ago
4 0

Answer:

-7/24 = r

Step-by-step explanation:

3/8 = r + 2/3

Subtract 2/3 from each side

3/8-2/3 = r + 2/3-2/3

3/8 - 2/3 = r

Get a common denominator or 24

3/8 *3/3    - 2/3 *8/8    =r

9/24   - 16/24   =r

-7/24 = r

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Its C

hello, dark and cruel world...

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3 years ago
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Please help me. Answer each letters and explain how you get the answer
BartSMP [9]
The answer I think is the letter c
5 0
4 years ago
A bicycle with 18-in.-diameter wheels has its gears set so that the chain has a 6-in. radius on the front sprocket and 3-in. rad
Airida [17]

Answer:

<h2>19.28 mph</h2>

Step-by-step explanation:

<em>"The question is not complete, here is the complete question</em>

<em>A bicycle with 18-in.-diameter wheels has its gears set so that the chain has a 6-in. radius on the front sprocket and 3-in. radius on the rear sprocket. The cyclist pedals at 180 rpm.</em>

<em>Find the linear speed of the bicycle in in/min (correct to at least two decimal places)  </em>

<em>How fast is the bike moving in mph (to two decimal places)?"</em>

Step one:

given data

the diameter of wheels= 18 inches

radius of front sprocket=6 inches

radius of rear sprocket= 3 inches

The cyclist pedals at 180 rpm

The chains move at the same speed, hence

the rear sprocket must make 6/3 revolutions for every one revolution made by the front sprocket

when the rider moves the front sprocket through 180 revs/min

the rear sprocket moves through 180 (6/3)  = 360 revs/min

the linear speed of the bicycle in inches per minute  =

 2π * 9 * 360   = about 20360.16  in/min

<u>The speed in mph</u>

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4 0
3 years ago
Whats 4x5x6x32x4x4x4x4
adoni [48]

Answer:

983,040

Step-by-step explanation:

4×5=20

6×32=192

4×4=16

4×4=16

20×192×16×16

=983,040

5 0
2 years ago
A random sample of 17 hotels in Boston had an average nightly room rate of $165.40 with a sample standard deviation of $21.70. T
Citrus2011 [14]

Answer:

•Lower confidence limit = $155.2109

•Upper confidence limit ,= $174.5891

Step-by-step explanation:

We are given:

U = 17

x' = $165.40

S.d = $21.70

a = 10℅ (90℅ confidence interval)

For s.d(x'), we have:

S/√u = \frac{21}{\sqrt{7}}

= 5.2630

Therefore, S.E (x') = $5.2630

At a= 0.10 (90℅ confidence level)

and degree of freedom = 16 (17-1)

Thus, t_1_6_, _0_._1_0 = 1.746

90℅ confidence interval all around sample mean, will be:

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= (165.4±(174.6)(5.2630)

(165.5±9.189)

($156.2109, $175.5891)

5 0
3 years ago
Read 2 more answers
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