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romanna [79]
2 years ago
11

Twice the quantity b plus 9

Mathematics
1 answer:
mojhsa [17]2 years ago
5 0

Answer:

2b+9

Step-by-step explanation:

Twice the quantity b is 2*b = 2b

...and then you add 9 which is:

2b+9

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W=33/8.7
w=3.79
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I need help please ​
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A. 11/1=165/h<br> B. 11/1=h/165<br> C. 132/12=h/165<br> D=12/132=165/h<br><br> plz help
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A radar gun was used to record the speed of a swimmer (in meters per second) during selected times in the first 2 seconds of a r
Natalka [10]
Trapezoidal is involving averageing the heights
the 4 intervals are
[0,4] and [4,7.2] and [7.2,8.6] and [8.6,9]

the area of each trapezoid is (v(t1)+v(t2))/2 times width

for the first interval
the average between 0 and 0.4 is 0.2
the width is 4
4(0.2)=0.8

2nd
average between 0.4 and 1 is 0.7
width is 3.2
3.2 times 0.7=2.24

3rd
average betwen 1.0 and 1.5 is 1.25
width is 1.4
1.4 times 1.25=1.75

4th
average betwen 1.5 and 2 is 1.75
width is 0.4
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add them all up
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5.49
t=time
v(t)=speed
so the area under the curve is distance
covered 5.49 meters
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3 years ago
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