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Illusion [34]
3 years ago
7

A dance school has 63 ballet dancers a 42% of the total number of dancers in the score ballet dancers what is the total number o

f dancers in the school
Mathematics
1 answer:
melamori03 [73]3 years ago
3 0
42% of what is 63

0.42x = 63
x = 63/0.42
x = 150

There are 150 dancers in the school
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People are entering a building at a rate modeled by f (t) people per hour and exiting the building at a rate modeled by g (t) pe
erastova [34]

Answer:

The correct option is D) f'(t)-g'(t) > 0

Step-by-step explanation:

Consider the provided information.

People are entering a building at a rate modeled by f (t) people per hour and exiting the building at a rate modeled by g (t) people per hour,

The change of number of people in building is:

h(x)=f(t)-g(t)

Where f(t) is people entering in building and g(t) is exiting from the building.

It is given that "The functions f and g are non negative and differentiable for all times t."

We need to find the the rate of change of the number of people in the building.

Differentiate the above function with respect to time:

h'(x)=\frac{d}{dt}[f(t)-g(t)]

h'(x)=f'(t)-g'(t)

It is given that the rate of change of the number of people in the building is increasing at time t.

That means h'(x)>0

Therefore, f'(t)-g'(t)>0

Hence, the correct option is D) f'(t)-g'(t) > 0

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3 years ago
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Art [367]

Answer:

No and Yes.

Step-by-step explanation:

The inequation is y ≥-x+7 and the pair is (x,y)=(-1,-1). Then:

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3> -5/4 and this is true, so (5,3) is a solution of  y>(3/4)x-5.

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X =-3 I think

Step-by-step explanation:

Im not to sure giohg ohojhtjot

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3 years ago
20 points and brainliest. Please help me.
motikmotik

Answer:

una

Step-by-step explanation:

4/20=.20

.20 per pencil

hope this helps, brainliest appreciated

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