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juin [17]
3 years ago
9

I have 30 coins consisting of nickels, dimes and quarters. The total value of the coins is $4.60. there are two more dimes than

quarters. how many of each kind of coin do i have?
Mathematics
1 answer:
aleksklad [387]3 years ago
8 0

If you have 1 nickle, how many quarters do you have? (3)

If you have 4 nickles, you have 3 times as many quarters (3)(4) = 12

If you have n nickles, then you have 3n quarters so 3n = q, you have  a slightly different equation.

 

If you fix this equation and use substitution like you did, you can get the right answer; you can also try to work in the other information that you have - converting all coin values to cents

    5n + 10d + 25q = 460

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What is the probability that Jim, Bruce, Valerie, and Simon are selected in that order
irinina [24]

The first person can be chosen in 4 different ways.

The second person can be chosen in 3 different ways.

The third person can be chosen in 2 ways

The last person can only be chosen in 1 way.

4 * 3 * 2 * 1

there are 24 different ways that this can be done.

There is only 1 correct order.

The answer is 1/24 ways. 1/24 = 0.04166666

7 0
3 years ago
A certain television is advertised as a 55-inch TV (the diagonal length). If the width of the TV is 42 inches, how many inches t
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Answer:

69.20in

Step-by-step explanation:

Given data

diagonal of the TV d= 55in

Widht of the TV w=  42 in

Hight h= ???

Applying the Pythagoras theorem

d^2= w^2+ h^2

substitute

55^2= 42^2+ h^2

3025= 1764+ h^2

3025+1764= h^2

4789= h^2

h=√4789

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Hence the Heigth is 69.20in

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3 years ago
The hartford insurance company has hired you to poll a sample of adults about their car purchases. what is wrong with using tele
lawyer [7]

Answer:

Step-by-step explanation:

Given that the hartford insurance company has hired you to poll a sample of adults about their car purchases.

Here the insurance company is using convenience sampling to select customers so they resorted to taking the names from telephone directories.

But this may not be reliable since persons owning cars need not have telephones and similarly persons having telephones need not own cars

Owning a car and name appearing in telephone directory need not be associated at all

So taking random sample of names from telephone directories may not give the required accurate result since here sample cannot be assumed to represent the population of car owners.

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3 years ago
Consider two circular swimming pools. Pool A has a radius of 48 feet, and Pool B has a diameter of 29.46 meters. Complete the de
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Answer: pool B has a greater circumference.

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The formula for determining the circumference if a circle is expressed as

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1 foot ≈ 0.305 meters

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Radius of pool B = 29.46/2 = 14.73 meters

The circumference of pool B is

2 × 3.14 × 14.73 = 92.5 meters

Therefore, pool B has a greater circumference.

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