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salantis [7]
3 years ago
11

I need help with these problems please and thank you

Mathematics
2 answers:
AURORKA [14]3 years ago
7 0

Answer:

Refractive index of a medium depends upon the refractive index of the surroundings

artcher [175]3 years ago
4 0

Answer:

5. There are 4 coins in every punch

6. There are 5 coins in every punch

7. There is 1 coin in every punch

8. There aren't coins in the punches

Step-by-step explanation:

5.

    4x+2=18\\4x=18-2\\4x=16\\x=\frac{16}{4} \\x=4

6.

    3x+5=20\\3x=20-5\\3x=15\\x=\frac{15}{3}\\x=5

7.

    2x+10=9+3x\\x+-3x=9-10\\-1x=-1\\x=1

8.

    2x+14=14\\2x=14-14\\2x=0\\x=\frac{0}{2}\\x=0

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Simplify the expression 3/2 (5/3) -1 1/4 + 1/2 Given the answer as a simplified fraction. The simplified expression is a/b.
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<h2>Hello!</h2>

The answer is:

The simplified fraction is:

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<h2>Why?</h2>

To solve this problem we must remember the following:

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\frac{a}{b}(+-)\frac{c}{d}=\frac{ad(+-)bc}{bd}

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So, solving we have:

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\frac{15}{6}-\frac{5}{4}+\frac{1}{2}=(\frac{5}{2}-\frac{5}{4})+\frac{1}{2}\\\\(\frac{5}{2}-\frac{5}{4})+\frac{1}{2}=(\frac{(4*5)-(2*5)}{8})+\frac{1}{2}\\\\(\frac{(4*5)-(2*5)}{8})+\frac{1}{2}=(\frac{20-10}{8})+\frac{1}{2}\\\\(\frac{20-10}{8})+\frac{1}{2}=(\frac{10}{8})+\frac{1}{2}\\\\(\frac{10}{8})+\frac{1}{2}=\frac{5}{4}+\frac{1}{2}\\\\\frac{5}{4}+\frac{1}{2}=\frac{(5*2)+(4*1)}{2*4}\\\\\frac{(5*2)+(4*1)}{2*4}=\frac{10+4}{8}=\frac{14}{8}\\\\\frac{14}{8}=\frac{7}{4}

Hence, the simplified fraction is:

\frac{7}{4}

Have a nice day!

8 0
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natka813 [3]
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Explanation:

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So each adult ticket costs $14.


You can check by filling in $14 and $4 for each equation.


4*14+6*4=80

4*14+7*4=84
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