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aksik [14]
3 years ago
9

The race speeds for the top eight cars in a 200-mile race are listed below. Use the range rule of thumb to find the standard dev

iation.189.1 185.9 189.2 182.4 175.6 184.2 188.3 177.2a. 7.5b. 6.8c. 3.4d. 1.1
Mathematics
1 answer:
andre [41]3 years ago
7 0

Answer:3.4d

Step-by-step explanation: From Range Rule of thump:

Standard Deviation = (Range)/4

=[(Highest value - lower value)]/4

=(189.2 - 175.6)/4

=13.6/4

=3.4

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mafiozo [28]

Answer:

3.3 gallons

Step-by-step explanation:

(2 3/4)/x = (3 1/3)/4

(11/4)/x = (10/3)/4 (cross multiplication)

(11/4)*(4/1)=44/4=11

11/(10/3) = ( 11/1 ) * (3/10) = 33/10 = 3.3 gallons

3 0
3 years ago
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the perimeter of a square is 20 ft if you increase the length of the square by 2 feet and decrease the width by 1ft what is the
IrinaVladis [17]

Answer:

28 ft squared

Step-by-step explanation:

The 4 sides of a square are equal in length, so if the perimeter is 20ft that means each side would have to be 5ft, (20/4 = 5). If you increase the length by 2ft, one of the sides would now become 7ft (5+2 = 7). If you decrease the length of the other side by 1ft, the length would now be 4ft (5-1=4). Now to find the area, all you have to do is length * width. So you would do 7ft*4ft which is 28ft squared.

4 0
4 years ago
Are the expressions -0.5(3x + 5) and -1.5x + 2.5 equivalent? Explain why or why not.
Vikki [24]
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5 0
3 years ago
Find the area D (1,3) F (-4,-3) E (4, -3)​
tresset_1 [31]

Answer:

Step-by-step explanation:

FE=4+4=8

Altitude=3+3=6

area=1/2×FE×6=1/2×8×6=24 sq. units.

or

area=1/2×

I 1   3|

|-4 -3|

| 4 -3|

|  1  3|

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3 years ago
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