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4 years ago

When Javier and his father went to dinner, the bill was $34. If they tipped the waiter 20%, how much did they spend in total?

Mathematics

2 answers:

ss7ja [257]4 years ago

5 0

I believe the answer is $40.8

Kamila [148]4 years ago

4 0

Answer:

Not sure if this is right, but I got $40.8.

Step-by-step explanation:

I first turned 20% into a decimal. (0.20).

Then I multiplied 0.20 and 34 which is 6.8.

I then added 34 since it’s the original cost to 6.8 since that’s the tip amount.

After that, you should get $40.8.

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cluponka [151]

value of x = 20 and value of y=16

Solution set=(20,16)

Step-by-step explanation:

We need to solve system of equations:

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Let:

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Simplifying equation 2:

$\frac{1}{2}x+ \frac{1}{2}y=18$

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Adding eq(1) and eq(3)

$x-y=4\\x+y=36\\-----\\2x=40\\x=40/2\\x=20$

Putting value of x in eq(1) and finding y:

$x-y=4\\20-y=4\\-y=4-20\\-y=-16\\y=16$

So, value of x = 20 and value of y=16

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Keywords: System of equations

Learn more about system of equations at:

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