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salantis [7]
2 years ago
11

I need help with these problems please and thank you

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

Answer:

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

artcher [175]2 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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