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Tanya [424]
2 years ago
8

If you have 12 campers and you buy each a book that cost 7.50 dollars how much did you spend

Mathematics
1 answer:
Tju [1.3M]2 years ago
7 0

Answer:

90

Step-by-step explanation:

Take the cost of each book and multiply by the number of people who bought each book

7.50 * 12

90

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3 years ago
1. if 5 oranges cost 60 cents, how much does 1 orange cost?
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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

i.e 5x+45y=15 -------------2

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
How do you sovle for b w= 2a + 3b
raketka [301]
Hope This helps you..!!!!

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Norma-Jean [14]

the first answer would be 5 the second is 10 and the last one is 110

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