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ValentinkaMS [17]
3 years ago
6

At Meadowsweet restaurant, Kevin bought 2 burgers, 2 cake slices, and 1 soda. The burgers cost $1.75 each, the cake slices cost

$1.50 a piece, and the soda cost $1.00. How many quarter dollars should he pay?
Mathematics
1 answer:
Elenna [48]3 years ago
4 0

Answer:

He should pay 30 quarters

Step-by-step explanation:

To find the number of quarter dollars he should pay, first calculate out the amount of money this would cost. For this, we can multiply the cost of the item by the number of them that we got and then add them all together.

Burgers

2 * 1.75 = 3.50

Cake

2 * 1.50 = 3.00

Soda

1 * 1.00 = 1.00

Total

3.50 + 3.00 + 1.00 = 7.50

Now to find out how many quarters he should pay, we divide the amount by .25.

7.50/.25 = 30

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The goal is to cancel out one of the variables in order to easily solve for the other variable.

Do this by changing the equations so that the coefficients of either x or y add up to 0.

Notice the coefficients of y are 3 and 3, if we make one of them negative then they add up to 0. 3+ (-3) = 0

Multiply 2nd equation by -1.

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x = 8/4 = 2

Plug x=2 back into one of original equations to find y.
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22% of the customers visiting the suit department of a certain store will purchase a suit, 30% will purchase a shirt and 28% wil
Ulleksa [173]

Answer:

If there are 1000 customers in the store one week, how many will purchase exactly one of these items

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Step-by-step explanation:

A The event that a persons buys a suit  

B The event that a person buys a shirt  

C The event that a person buys a tie  

 

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A u B u C Is the event that any item is bougth

AC u AC u BC Is the event that any two events occured

So the wanted probability is

P[(A u B u C )(AB u AC u BC)^c

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P[(A u B u C ) =0.22+0.30+0.28-0.11-0.14.-0.10+0.06

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0,51=+0,23+P[(A u B u C )(AB u AC u BC)^c

        =0,28

1000 CUSTOMERS*28%=280

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