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3 years ago

If the scale factor for the dilation shown is 3 which is the length of B’ C’

Mathematics

2 answers:

lana66690 [7]3 years ago

5 0

Answer:

15 its 15 dont listen to the guy who said a

Step-by-step explanation:

photoshop1234 [79]3 years ago

3 0

Answer: A 5/3

Step by step explanation:
If the dilation is 3 then simply divide the number (5) by 3 and you’ll get your answer

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Two gears are adjusted so that the smaller gear drives the larger one. if the smaller gear of 3.7cm rotates through an angle of

zepelin [54]

Answer:

The larger gear will rotate through 156°

Step-by-step explanation:

Arc Length

The arc length S of an angle θ on a circle of radius r is:

$S = \theta r$

Where θ is expressed in radians.

The smaller gear of r1=3.7 cm drives a larger gear of r2=7.1 cm. The smaller gear rotates through an angle of θ1=300°.

Convert the angle to radians:

$\displaystyle \theta_1=300*\frac{\pi}{180}=\frac{5\pi}{3}$

The arc length of the smaller gear is:

$\displaystyle S_1=\frac{5\pi}{3}\cdot 3.7$

$\displaystyle S_1=\frac{18.5\pi}{3}$

The larger gear rotates the same arc length, so:

$\displaystyle S_2=\frac{18.5\pi}{3}$

$\displaystyle \theta_2\cdot r_2=\frac{18.5\pi}{3}$

Solving for θ2:

$\displaystyle \theta_2=\frac{18.5\pi}{3r_2}$

$\displaystyle \theta_2=\frac{18.5\pi}{3*7.1}$

$\theta_2=2.73\ radians$

$\displaystyle \theta_2=2.73*\frac{180}{\pi}=156$

The larger gear will rotate through 156°

7 0

3 years ago

A certain journey by train takes 5 hours at the speed of 45 km/h. What will be the speed of the train to complete the same journ

Liula [17]

A certain journey by train takes 5 hours at the speed of 45 km/h. What will be the speed of the train to complete the same journey in 3 hours?

3 0

2 years ago

Read 2 more answers

Please solve this question based on integeration chapter

Olenka [21]

Answer: -ln |cos x| - ln |sin x| + C

Step-by-step explanation:

$.\quad \int\dfrac{sin^2x-cos^2x}{sin\ x\ cos\ x}dx\\\\\\=\int \dfrac{sin^2x}{sin\ x\ cos\ x}dx-\int \dfrac{cos^2x}{sin\ x\ cos\ x}dx\\\\\\=\int \dfrac{sin\ x}{cos\ x}dx-\int \dfrac{cos\ x}{sin\ x}dx\\\\\\=\int tan\ x\ dx - \int cot\ x\ dx\\\\=-ln |cos\ x|-ln|sin\ x| + C$

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3 years ago

Help pleaseeeeeeeeeeeeeeeeee

arlik [135]

Answer:

Cant see the picture sorry

Step-by-step explanation:

7 0

3 years ago

Help please will mark brainliest

anyanavicka [17]

Answer:

its is the first grap btw did u knopw u can just copy the quetion and paste it on the space bar above and presss enter it easier that way

Step-by-step explanation:

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3 years ago