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3 years ago

Trig help please, 2 questions, 10 pts

Mathematics

2 answers:

Alex_Xolod [135]3 years ago

7 0

Answer

1=b

2=c

Step-by-step explanation:

just olya [345]3 years ago

6 0

A flywheel rotates 450 times in 1 minute. How many degrees does it turn in 1 second?
a. 39 degrees
b. 2700 degrees
c. 18 degrees
450 times in 60 sec
450 times of 360 deg in 60 sec
162000 deg in 60 sec
162000/60 in 1 sec
2700 deg in 1 sec
choose B

The speed of a carousel is 4.3 revolutions per minute. James chooses a red horse. If the typical ride is 5 minutes, how far is his starting point is James when the ride is over?
a. 90 degrees
b. 0 degrees
c. 180 degrees
4.3 revolutions per 1 minute
4.3 x 5 revolutions in 5 min
21.5 revolutions in 5 min
Means: a 21 whole revolution and a half of a revolution. A half of a circle = 180 degrees.
choose C

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Literal equations 2x-3y=8 solve for y

vichka [17]

2x-3y = 8

Add 3y on both sides

2x = 8 + 3y

Subtract 8 on both sides

3y = 2x - 8

Divide 3 on both sides

$y= \frac{2}{3}x- \frac{8}{3}$

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3 years ago

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Help with num 9 please. thanks

Alik [6]

Answer:

See Below.

Step-by-step explanation:

We want to show that the function:

$f(x) = e^x - e^{-x}$

Increases for all values of x.

A function is increasing whenever its derivative is positive.

So, find the derivative of our function:

$\displaystyle f'(x) = \frac{d}{dx}\left[e^x - e^{-x}\right]$

Differentiate:

$\displaystyle f'(x) = e^x - (-e^{-x})$

Simplify:

$f'(x) = e^x+e^{-x}$

Since eˣ is always greater than zero and e⁻ˣ is also always greater than zero, f'(x) is always positive. Hence, the original function increases for all values of x.

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3 years ago

Select the correct answer. Every dimension of a triangular pyramid is multiplied by 10 to produce a new figure that is geometric

BaLLatris [955]

Answer:

C. The surface area of the pyramid is multiplied by 100

Step-by-step explanation:

The area is the function of the two dimensions.

If each dimension has changed by 10 times, the the area will change by:

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Correct choice is C

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3 years ago

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Anettt [7]

Answer: 58.42

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3 years ago

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Answer:

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3 years ago