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timurjin [86]
3 years ago
13

Sandra waits tables at Polly's Tamales. While she is working, she receives a discount on any food she buys. If an item normally

costs d dollars, Sandra can buy it for 2/3
d dollars. Last night at work, Sandra bought a taco salad that normally costs $9.
What price did Sandra pay for the taco salad?
Mathematics
1 answer:
Aloiza [94]3 years ago
3 0
Sandra pay $6 for the taco salad
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Sidney cuts 6 slices of bread. She splits them evenly among p plates. Write an expression that shows how many slices are on each
fiasKO [112]

Answer: \frac{6}{P}

Step-by-step explanation:

\\Since she splits them evenly , it means she splits them equally.

\\The number of slice in each plate will be the total number of slices divided by the number of plates.

\\The total number of slice = 6

\\The total number of plates = P

\\So , in each plate we have  \frac{6}{P} slices

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What is the area of the triangle?
Leona [35]

Answer:

40

Step-by-step explanation: you have to multiply 4 by 10 to get ur answer

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Find the volume of the cylinder. Round your answer to the nearest tenth.
GrogVix [38]

We know diameter d=8 and height h=16.

First find the radius of the bottom of the cylinder,

r=\dfrac{d}{2}=\dfrac{8}{2}=4.

Then find the area of the bottom of cylinder,

A=\pi r^2=16\pi.

Then to find volume just multiply the height with the area of the bottom of the cylinder,

V=Ah=16\cdot16\pi=16^2\pi\approx804.247\mathrm{cm^3}.

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A bag contains $3$ white chips and $3$ red chips. you repeatedly draw a chip at random from the bag. if it's white, you set it a
Natasha2012 [34]

Answer:

8.5

Step-by-step explanation:

We can divide this experiment in three parts.

  • Before removing any white chip
  • After ramoving one white chip, and before removing two
  • After removing two white chips

For the first experiment, for each extraction we will always have 3 white chips and 3 red chips, becuase if we extract a red chip, then we put it back in the bag, and if it is a white chip, then the experiment ends there. The probability of taking out a white chip is 1/2.

For the second experiment, we will have always 2 white chips, and 3 red chips. So the probability of success is 2/5 = 0.4

For the third experiment, we will have always 1 white chip and 3 red chips, so the probability of success if 1/4 = 0.25.

We want to know how many extractions we need for each experiment until we pick a white chip. Note that each experiment is independent of each other, and each one has geometric distribution, the first one with probability of success 0.5, the second one with probability of success 0.4, and the third one with p = 0.25.

The total experiment, X, is the sum of this random variables, so the expected value of the total experimet is the sum of the expected value from each of its parts, lets call them, X₁, X₂ and X₃. Thus,

E(X) = E(X_1) + E(X_2) + E(X_3) = \frac{1}{0.5}+\frac{1}{0.4} +\frac{1}{0.25} = 2 + 2.5 + 4 = 8.5

The expected number of draws is 8.5.

I hope i could help you!  

7 0
3 years ago
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