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german
3 years ago
15

A family went out to dinner. The cost of their meal was $57.50, before sales tax and tip.

Mathematics
1 answer:
dezoksy [38]3 years ago
7 0

Answer:

I hope I got this answer right

A is 4.60 and B is 8.30

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If 3 is added to a number and the sum is tripled​, the result is 21 more than the number. find the number.
zavuch27 [327]
<span>If 3 is added to the number: x + 3
b) ...and the sum is tripled.. 
"The sum" is "x + 3" so: 3(x+3)
c) ...the result is 27 more than the number.
27 more than the number is x + 27 
d) Put it all together:
3(x + 3) = x + 27 
Solve for x: 
1) Distribute the left side of the equation:
3x + 9 = x + 27

2) Subtract x from each side of the equation:
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3) Subtract 9 from each side of the equation:
2x = 18
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x = 9 
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So, therefore The answer is correct</span>
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Leni [432]
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Answer:

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Step-by-step explanation:

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