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Viefleur [7K]
3 years ago
7

A piano tuner charged a flat rate of $25 plus $12 per hour to tune a piano. Which expression represents how much the piano tuner

earns tuning a piano for h hours?
Mathematics
1 answer:
4vir4ik [10]3 years ago
4 0

Answer:

T = 25 + 12 * h

Step-by-step explanation:

To find the rate of the tuner it is necessary to go to an equation:

First would be the full rate that has a value of 25. And for every hour that is 12.

That is to say:

T = 25 + 12 * h

h being the hours it takes to tune the piano. And this equation would reprehend what the piano tuner

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3 years ago
At a manufacturing plant where switches are made, it is a known fact that 2% of all switches are defective. If two switches are
olchik [2.2K]

Answer:

The probability that exactly one switch is good is

P(x) =0.0392

Step-by-step explanation:

The probability that a switch is defective is:

P(D) = \frac{2}{100} =0.02

The probability that a switch is not defective is

P(D') = 1-P(D)=0.98

Therefore, if two switches are selected, the probability that exactly 1 is good is:

P(1=1)=P (D) P (D ') + P (D') P (D)

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6 0
4 years ago
Read 2 more answers
Which of the following expressions are equivalent? Justify your reasoning,
marshall27 [118]

Answer:

B and D

Step-by-step explanation:

B:

Anything to a negative power means that it is 1/that to the positive power.

E.g. x^-1 = 1/x^1

In other words, anything to the power of a negative switches sides of a fraction (i.e. if in numerator moves to denominator and vice versa.)

1/x^-1 = 1/1/x^1 which is just equal to x, because there are x number of 1/xs in one (1/x * x =1) Therefore Option B is equal to just x.

D: (assuming the first given term is x^1/3 and not X1/3 (?) Correct me if I'm wrong).

x^1/3 * x^1/3 * x^1/3 is also equal to just x.

This is because when multiplying together terms with the same base (x in this case) the exponents just add together, so:

x^1/3 * x^1/3 * x^1/3 = x^(1/3 +1/3 +1/3) = x^1 = x.

Therefore B and D are equivalent because they both equal x.

Hope this helped!

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3 years ago
Write an equation for how d distance and t time are related for travel at each speed
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speed = Distance taken / time travelled

8 0
3 years ago
Use the function below to find F(3).
arlik [135]

Answer:

The choice D.

Step-by-step explanation:

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7 0
2 years ago
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