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uranmaximum [27]
3 years ago
7

A circular running track is 1/4 mile long. Elena runs on this track completing each lap of 1/20 of an hour. What is Elena's runn

ing speed
Mathematics
1 answer:
Andrew [12]3 years ago
8 0
Elenas running speed is 5 miles per hour
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Which of the following is an example of a permutation?
nlexa [21]

Answer:

d

Step-by-step explanation:

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3 years ago
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please help really quickly i will literally give u 5 stars thanks and brainliest its also worth 21 points please help quickly i
Alika [10]

Answer:

PART B: E,B and C, A

Step-by-step explanation:

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3 years ago
Find the difference quotient and simplify your answer. f(x) = 4x − x2, f(4 + h) − f(4) h , h ≠ 0
Anon25 [30]

The difference quotient and simplification will be    = [4 -h-2x]

The given equation is as follows:   f(x)= 4x - x²

For finding the quotient and further simplification we must follow the following steps:

[f(x + h) - f(x)] / h = [4(x + h) - (x + h)² - 4x + x²]/ h

<h3>What is simplification of algebraic operations?</h3>

Getting the functions in their lowest terms is known as simplification.

Brackets will get open and solved further;

[f(x + h) - f(x)] / h = [4(x + h) - (x + h)² - 4x + x²]/ h

[f(x + h) - f(x)] / h = [4h - h² - 2x]/ h  

Finally dividing the whole equation with h;

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7 0
1 year ago
The length of a rectangle is 11 less than 9 times the width. The
Olin [163]

Answer:

Length = 7   Width = 2

Step-by-step explanation:

L = Length

W = Width

L=9w-11

2L+2W=18

2(9W-11) + 2W = 18

18W - 22 +2W = 18

20W -22 = 18

20W = 40

W = 2

L = 9(2)-11

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8 0
3 years ago
The line contains the point (-4,-4) and is perpendicular to a line with a slope of 5/2 . The equation is this line is ?
Trava [24]

Answer:

2x + 5y + 28 = 0

Step-by-step explanation:

since they are perpendicular,

m1 ×m2 = -1

5/2 × m2 = -1

m2 = -2/5

now,

y -y1 = M (x-x1)

y - (-4) = -2/5 ( x - (-4) )

y +4 = -2/5 ( x + 4 )

5 ( y +4 ) = -2 ( x+4)

5y +20 = -2x - 8

2x + 5y +20 + 8 =0

2x + 5y + 28 = 0

3 0
3 years ago
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