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Andreas93 [3]
3 years ago
11

Erica has a 18% discount coupon for an electronics store.she sees a new television that she wants to buy. After the 18% discount

was applied, Erica paid 492 dollars for the television. What's was the original price of the television
Mathematics
1 answer:
dimulka [17.4K]3 years ago
4 0
I believe the original price of the television was 580.56 because 492*18%=88.56 so 492+88.56=580.56 hope this helps
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Help pls<br><br>Find x<br>a(21)<br>b(27)<br>c(9)<br>d(18)​
tino4ka555 [31]

9514 1404 393

Answer:

  a.  21

Step-by-step explanation:

The external part of the hypotenuse of the right triangle is shown. The full length of the hypotenuse is 9+20 = 29. The Pythagorean theorem can be used to find x.

  x^2 +20^2 = 29^2

  x^2 = 841 -400

  x = √441

  x = 21

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<em>Alternate solution</em>

The diameter of the circle is 2·20 = 40 units, so the product of distances from the external vertex to the opposite sides of the circle along the secant is (9)(40+9). The product of the distances along the tangent is x·x. These two products are equal, so ...

  x^2 = 9(49)

  x = (√9)(√49) = 3·7

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3 0
3 years ago
How do i do this math problem?
Evgesh-ka [11]

Answer:

3x

Step-by-step explanation:

The area of a triangle is (base × height)/2.

In this picture, the base is 3.

The height is 2x.

(3×2x)/2

=6x/2

=3x

7 0
3 years ago
4-member curling team is randomly chosen from 6 grade 11 students and 8 grade 12 students. What is the probability that the team
Ivanshal [37]

Answer:

0.5944 = 59.44% probability that the team has at least 2 grade 11 students

Step-by-step explanation:

The students are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

We have that:

6 + 8 = 14 students, which means that N = 14

6 grade 11 students means that k = 6

Teams of 4 members means that n = 4

What is the probability that the team has at least 2 grade 11 students?

This is:

P(X \geq 2) = 1 - P(X < 2)

In which

P(X < 2) = P(X = 0) + P(X = 1)

So

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

P(X = 0) = h(0,14,4,6) = \frac{C_{6,0}*C_{8,4}}{C_{14,4}} = 0.0699

P(X = 1) = h(1,14,4,6) = \frac{C_{6,1}*C_{8,3}}{C_{14,4}} = 0.3357

Then

P(X < 2) = P(X = 0) + P(X = 1) = 0.0699 + 0.3357 = 0.4056

P(X \geq 2) = 1 - P(X < 2) = 1 - 0.4056 = 0.5944

0.5944 = 59.44% probability that the team has at least 2 grade 11 students

5 0
3 years ago
PLEASE HELP ME!!!!!
Irina18 [472]

Answer:

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Step-by-step explanation:

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f(6) = -4 + 5

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4 0
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jeyben [28]

Answer:

3

Step-by-step explanation:

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