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____ [38]
3 years ago
14

Need answers plz would be appreciated

Mathematics
1 answer:
Archy [21]3 years ago
5 0

Answer:

1) x=5

2) x=7

3) x=8

4) x=4

5) x=7

6) x=8

Step-by-step explanation:

Since each pair is similar, their sides are in ratio:

1)

(2x+2)/6=18/9

2x+2=2*6

2x=12-2

x=10/2

x=5

2)

(x-2)/4=10/8

x-2=1.25*4

x=5+2

x=7

3)

(3x-6)/12=24/16

3x-6=1.5*12

3x=18+6

x=24/3

x=8

4)

(2x+4)/15=16/20

2x+4=0.8*15

2x=12-4

x=8/2

x=4

5)

(x+2)/15=6/10

x+2=0.6*15

x=9-2

x=7

6)

(-3+x)/6=10/12

-3+x=6*(10/12)

x=5+3

x=8

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The average fuel efficiency of U.S. light vehicles for 2005 was 21 mpg. If the standard deviation of the population was 2.9 and
statuscvo [17]

Answer:

1) The probability that the mean mpg for a random sample of 25 light vehicles is 0.042341.

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Step-by-step explanation:

Problem #1:

  • Using the z-score formula, z = (x-μ)/σ/n, where x is the raw score = 20 mpg,μ is the population mean = 21 mpg , σ is the population standard deviation = 2.9, n = random number of samples.
<h3><u>X < 20</u></h3>
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<em>P-value from Z-Table:</em>

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Problem #2:

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6 0
3 years ago
A right rectangular prism is 5 1/4 in. wide, 12 1 2 in. long, and 4 in. tall.
lozanna [386]

Answer: V = 262\frac{1}{2} cm^{3}

Step-by-step explanation:

V = LWH

V = 5\frac{1}{4} X 12\frac{1}{2} X 4

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Irina18 [472]
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