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mamaluj [8]
4 years ago
13

Emily has pennies and five dollar bills in her pocket. The number of pennies is eight less than three times the number of five d

ollar bills. Let f represent the number of five dollar bills. Write an expression for the number of pennies
Mathematics
2 answers:
Zina [86]4 years ago
6 0

Answer:

3f - 8 = number of pennies

Step-by-step explanation:

3f - 8 = number of pennies

zzz [600]4 years ago
6 0

Answer:

p = 3*f - 8

Step-by-step explanation:

Let f represent the number of five dollar bills and p the number of pennies.

The expression "The number of pennies is" is equivalent to "p =";

"three times the number of five dollar bills" is equivalent to "3*f"

"eight less than three times the number of five dollar bills" is equivalent to      "3*f - 8"

Then the expression is p = 3*f - 8

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A tour operator has a bus that can accommodate 20 tourists. The operator knows that tourists may not show up, so he sells 21 tic
dalvyx [7]

Answer:

The expected revenue of the tour operator is 985.

Step-by-step explanation:

There are two outcomes:

Either less than 21 tourists show up and the operator does not have to pay anything. Or 21 tourists show up and the operator has to repay 100.

Anyways, initially he gets the price of all the tickets sold. That is 21 each at 50, so R = 21*50 = 1050.

Then, we need to find the probability that all of the 21 tourists show up. In this case, we have to subtract 100 from the revenue.

Each tourist has a 0.02 probability of not showing up. This means that each has a 1-0.02 = 0.98 probability of showing up. So the probability P that all 21 tourists show up is P = (0.98)^{21} = 0.6542.

So, the expected revenue of the tour operator is

R = 1050 - 100P = 1050 - 100(0.6542) = 984.58

Rounded up, the expected revenue of the tour operator is 985.

6 0
3 years ago
What is the solution to the equation -√(15+x)=-3?
marin [14]
So, the negative would be divided out to make it 3, then square both sides to get rid of the square root and get 9, then subtract 15 and you get -6.  <span />
7 0
3 years ago
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For the following right triangle, 12, 16, x. find the side length x
Alexeev081 [22]
So Pythagorean Theorem is a^2+b^2=c^2

So, 12^2+16^2= 400
c=400, but you need to find c^2. so do the square root of 400, which is 20. so x=20
7 0
4 years ago
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The equation of four lines are given. Identify which lines are perpendicular.
Bumek [7]
Lines 2 and four r perpendicular I think
6 0
3 years ago
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Help please, it would be appreciated greatly..
allochka39001 [22]

Answer:

A. x^21

Step-by-step explanation:

This is because when multiplying with same number on the bottom, it will stay the same. So, when multiplying the bottom stays the same while you add all the exponents.

Hope this helps:)

5 0
3 years ago
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