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2 years ago

Estimate a 15% tip on a dinner bill of $31.22 by first rounding the bill amount to the nearest ten dollars

Mathematics

2 answers:

Nutka1998 [239]2 years ago

6 0

If you do 31.00×15÷100=4.65 so tip should be 4.65

zheka24 [161]2 years ago

3 0

$\bf \begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{15\% of 31.22}}{\left( \cfrac{15}{100} \right)\stackrel{\textit{rounded up}}{30}}\implies 4.5$

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Dafna1 [17]

Answer:

5:21

Step-by-step explanation:

We know that currently (in the problem) it is 25 min before 4, or 3:35. When we add an hour to that (first part of the problem), we get 4:35. The way l like to continue from here is to take the second part (the 46 min) and just use part of it to round the hour off, and then add the other part to it.

From 4:35 to 5, we have 25 min

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We subtract those 25 min from the 46 min, since we used them to round the hour off.

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So an hour and 46 min from 3:35 it will be 5:21. I hope this helps :)

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2 years ago

Can u help me please

Dennis_Churaev [7]

Answer:

18. y = -5

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Step-by-step explanation:

Parallel lines have the same slope. You can find the slope from the equation y=mx+b. It is the m value.

For 19, the slope is 4 since y=4x has m = 4. To find a line parallel to it that crosses through the point (3,2), substitute m = 4 and (3,2) into the point slope formula.

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3 years ago

The ratio of flour to water in pasta dough is 3 to 2. If these are the only two ingredients what percentage of pasta dough is wa

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Step-by-step explanation:

Given: The ratio of flour to water in pasta dough = 3:2

That means the recipe of pasta dough is , 3 parts of flour to 2 parts of water.

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Hence, the percentage of pasta dough is water= $\frac{\text{parts of water}}{\text{parts of pasta dough}}\times100$

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