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Leokris [45]
4 years ago
14

Youth tickets(y) cost $2 for a ride, while adult tickets(x) cost $3. The amount of money earned is $54. If all the seats were fi

lled(24 seats), how many of each ticket was sold?
Mathematics
1 answer:
Paha777 [63]4 years ago
7 0
There are no constants here. But we have x and y here.
We will create an equation which is:
2y+3x=54.
But we will also create a second equation which states the number of seats.
x+y=24.

Now we do the two-equation solving method.
2y+3x=54
-2(x+y=24)

2y+3x=54
-2x-2y=-48

x=6

To solve for y, plug in x into one of the original equations. Which one doesn't matter.

y+6=24
y=18

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The probability that a lab specimen contains high levels of contamination is 0.12. A group of 4 independent samples are checked.
sergiy2304 [10]

Answer:

0.5996 is the probability that none contain high levels of contamination.

Step-by-step explanation:

We are given the following information:

We treat  lab specimen containing high levels of contamination as a success.

P( lab specimen containing high levels of contamination) = 0.12

Then the number of lab specimens follows a binomial distribution, where

P(X=x) = \binom{n}{x}.p^x.(1-p)^{n-x}

where n is the total number of observations, x is the number of success, p is the probability of success.

Now, we are given n = 4

We have to find the probability that none of the lab specimen consist of high level of contamination.

We have to evaluate:

P(x = 0)\\= \binom{4}{0}(0.12)^0(1-0.12)^{(4-0)}\\= 0.5996

0.5996 is the probability that none contain high levels of contamination.

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4 years ago
A circle with radius of 5 is dilated by a scale factor of 2. What is the area of the<br> image?
Tanya [424]

Answer: 100pi

Step-by-step explanation:

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3 years ago
What is this answer to this question
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The answer to 237 × 401 is <u>95037</u>

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3 years ago
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Ali and Janet are selling gifts at a local craft show. For every bar of soap that Ali sells, she earns $5. For every mug that Ja
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Answer:

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Step-by-step explanation:

Alli sells 5 bars, for each bar she earnd 5$ so she earns 5*5=25$

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The equation for Circle M is shown below. What is the area of Circle M in terms of π?
Paladinen [302]

Answer:  (141/4)pi

This looks like it matches up with choice D

===================================================

Work Shown:

Let's complete the square for the x and y terms like so

4x^2 + 4y^2 - 40x + 24y - 5 = 0

4x^2 - 40x + 4y^2 + 24y = 5

4(x^2 - 10x + y^2 + 6y) = 5

x^2 - 10x + y^2 + 6y = 5/4

x^2 - 10x + 25 + y^2 + 6y = 5/4 + 25

(x^2 - 10x + 25) + y^2 + 6y = 5/4 + 100/4

(x-5)^2 + y^2 + 6y = 105/4

(x-5)^2 + y^2 + 6y + 9 = 105/4 + 9

(x-5)^2 + (y^2 + 6y + 9) = 105/4 + 36/4

(x-5)^2 + (y + 3)^2 = 141/4

The last equation is in the form (x-h)^2 + (y-k)^2 = r^2 where (h,k) = (5,-3) is the center and r^2 = 141/4 leads to r = sqrt(141)/2 which is the radius.

The area of the circle is therefore,

A = pi*r^2

A = pi*141/4

A = (141/4)pi

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3 years ago
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