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Firlakuza [10]
2 years ago
9

Your final bill at the restaurant is $120 including a 20% tip. What was the cost of the original bill?

Mathematics
2 answers:
Fed [463]2 years ago
4 0
20% of 120 is 24 so you subtract 24 from 120 which is 96:)
vladimir1956 [14]2 years ago
4 0

Answer:

$96

Step-by-step explanation:

120 x 0.20= 96

hope this helps

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Step-by-step explanation:

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8 0
3 years ago
Rajan needs 1 liter of 15% hydrochloric acid solution for an experiment. He checks his storage cabinet, but he only has a 5-lite
Delvig [45]

Answer:

  1. <em>0.75</em><em> liters of 5% hydrochloric acid solution </em>
  2. <em>0.25</em><em> liters of 45% hydrochloric acid solution.</em>

Step-by-step explanation:

Let us assume that, x liters of the 5% hydrochloric acid and y liters of the 45% hydrochloric acid solutions are combined.

As Rajan need total of 1 liter of solution, so

x+y=1

i.e x=1-y --------------------1

As Rajan needs 5% hydrochloric acid and 45% hydrochloric acid to make a 1 liter batch of 15% hydrochloric acid, hence acid content of the mixture of two acids will be same as of the final one, so

0.05x+0.45y=1\times 0.15

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Putting value of x from equation 1 in equation 2,

\Rightarrow 5(1-y)+45y=15

\Rightarrow 5-5y+45y=15

\Rightarrow 5+40y=15

\Rightarrow 40y=15-5=10

\Rightarrow y=0.25

Putting the value of y in equation 1,

x=1-0.25=0.75

Therefore, Rajan must use 0.75 liters of 5% hydrochloric acid solution and 0.25 liters  of 45% hydrochloric acid solution.

4 0
3 years ago
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Shkiper50 [21]

Answer:

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x2 - 2x + = 4(x2-2x +1)-3

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x²-4x²-2x+8x = 4-3

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4 0
3 years ago
A group of students are selling homemade oatmeal cookies at $3 dollars per bag. The students spent $23 on all the supplies to ma
GrogVix [38]

Answer:

A. 3 x W - 23

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Profit is equal to money made minus costs

Let P equal profit.  We know the costs were 23, and they made 3 dollars per cookie.  If they sold W bags of cookies, the money made is 3*W

P = 3*W - 23

4 0
3 years ago
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