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Rudiy27
3 years ago
10

Yesterday, Nina's lunch cost $9.80 and she left a $1.47 tip. Today, Nina's lunch cost $12.60. If she tips the same rate that she

did yesterday, how much tip should Nina leave?
Mathematics
1 answer:
Anni [7]3 years ago
8 0
I think the answer is 1.89
Explanation: 9.80 divided by 1.47 is 6 2/3
12.60 divided by 6 2/3 is 1.89
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So first you would need to multiply each numbers....
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Then all you would have to do is subtract 4064 from 540.
Your answer is 3524. 
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Keywords:

<em>equation, operations, equivalent, binomial, square root </em>

For this case we have an equation in which we must apply operations to rewrite it in an equivalent way. We must start by raising both sides of the equation to the square. Thus, we eliminate the square root of the left side of equality and finally solve the binomial of the right side of equality.

So we have:

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By definition:(a + b) ^ 2 = a ^ 2 + 2ab + b ^ 2

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Answer:

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