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pav-90 [236]
3 years ago
14

A police officer is concerned about speeds on a certain section of interstate 95. the data accompanying this excersise show the

speeds of 40 cars on a saturday afternoon. The speed limit on this portioin of interstate 95 is 66 mph. Specify the competing hypotheses in order to determind if the average speed is greater than the speed limit. calculate the value of the test statistic

Mathematics
1 answer:
marysya [2.9K]3 years ago
7 0

Answer:

Please see attachment.

Step-by-step explanation:

Please see attachment.

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the total cost of 4 pens and 7 mechanical pencils is $13.25 the cost of each pencil is $0.75 write an equation that could be use
balu736 [363]
4x+7y=$13.25
4x+ 7($0.75)
7 0
3 years ago
Five times a number is the same as 30 more than 8 times the number. Find the number.
allsm [11]

5x = 8x+30

5x-8x+30 = 0

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5 0
3 years ago
Lincoln middle school plans to collect more than 2,000 cans of food in a food drive. So far, 668 cans have been collected. WRITE
AURORKA [14]
Let x be the unknown number.

7x + 668 < 2000     => 7x plus 668 is less than 2000

where:
7x => x represents the number of cans to be collected in 7 days
668 is the number of cans already collected.
2000 is the target number of cans.

7x  +  668    <    2000
 <u>       - 668           -668</u>
7x                <   1332
<u>÷7                        ÷7</u>
x                  <    190.30
or
x < 190

To check:

7x + 668 < 2000
7(190) + 668 < 2000
1330 + 668 < 2000
1998 < 2000
8 0
3 years ago
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Decimal expansion of 5/8
4vir4ik [10]

Answer:

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Step-by-step explanation:

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3 0
4 years ago
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Help me with this pls
Rufina [12.5K]

Answer:

b^-6

Step-by-step explanation:

(b^-2) / (b^4) = b^(-2 - 4)

3 0
3 years ago
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