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RSB [31]
4 years ago
14

Jorge bought 3 DVDs, each for the same price, and a set of earphones for a price of $10. The total cost before tax was $49. What

was the cost of one DVD?
Mathematics
1 answer:
Ilia_Sergeevich [38]4 years ago
8 0

Answer:

The cost of each DVDs is $ 13   .

Step-by-step explanation:

Given as :

The cost of earphones = $ 10

The number of DVDs bought = 3

The total cost of both items before tax = $ 49

Let The cost of each DVDs = $ x

So, According to question

The cost of earphones + The cost of 3 DVDs  = $ 49

Or, $ 10 + 3 × x = $ 49

Or,  3 × x = $ 49 - $ 10

Or,  3 × x = $ 39

∴  x = \frac{39}{3}

I.e x = $ 13

Hence The cost of each DVDs is $ 13   . Answer

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charle [14.2K]

Answer:

150°

Step-by-step explanation:

to find the individual angle of a REGULAR dodecagon (which means that all sides are equal), you'd use the equation I(individual angle)= (n-2)×180/n

N is number of sides. The number of sides on a dodecagon is 12. So, substitute N for 12

I= (12-2)×180/12 which simplifies to 10×180/12

10×180= 1800

1800/12 = 150

so, an individual interior angle of a dodecagon is 150°

6 0
3 years ago
Which number is not a whole number ? A. 8. B. -10. C. 0. D.18/3
NARA [144]

Answer:

B. -10 its a negative number

3 0
3 years ago
Please help with math
notka56 [123]

Choice C

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(2,0)

Only C gives you 0

5 0
3 years ago
yearly 17% rate of failure. Answer the following question.What is the probability that if you buy four computers, at least 1 wil
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17 x 4 = 68%

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5 0
3 years ago
The amount of gasoline sold each month to customers at Bob's Exxon station in downtown Navasota is a random variable. This rando
swat32

Answer:

The probability that Bob will win that wonderful trip on the basis of his gasoline sales this month

P(X≥ 2800) = P(Z₁≥1.5) = 0.0768

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Mean of the Population (μ) = 2500 gallons

Standard deviation of the population (σ) =200 gallons

Let 'X' be a random variable in Normal distribution

Given X = 2800

Z = \frac{x-mean}{S.D} = \frac{2800-2500}{200} = 1.5

<u><em>Step(ii):-</em></u>

The probability that Bob will win that wonderful trip on the basis of his gasoline sales this month

P(X≥ 2800) = P(Z₁≥1.5)

                  = 0.5 - A(Z₁)

                 =  0.5 - A(1.5)

                 =   0.5 -0.4232    ( from normal table)

                = 0.0768

<u><em>Conclusion</em></u>:-

The probability that Bob will win that wonderful trip on the basis of his gasoline sales this month

P(X≥ 2800) = P(Z₁≥1.5) = 0.0768

               

3 0
3 years ago
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