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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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Find the perimeter of the figure to the nearest hundredth​
Ostrovityanka [42]

Answer:

72

Step-by-step explanation:

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3 years ago
6. A bag contains 240 counters.
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Answer:

48

Step-by-step explanation:

8 0
3 years ago
1 Yerel earns extra money as a lifeguard He earns $45 for 4 hours and $78 75 for 7 hours
lbvjy [14]

Answer:

1= $11.25

2= $22.50

3= $33.75

4= $45

5= $56.25

6= $67.50

7= $78.75

Step-by-step explanation:

the first thing you want to do is divide 45 by 4 and get 11.25 and then you keep adding 11.25 till you get to 78.75

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3 years ago
Ashlynn is trying a low-carbohydrate diet. She would like to keep the amount of carbs consumed in grams between the levels shown
ra1l [238]

Answer:

C. x > 225 and x < 325

Step-by-step explanation:

Simplify each inequality:

460 < 2x + 10 =>

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225 < x

x > 225

and

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8 0
3 years ago
Read 2 more answers
$1100 at 8%, for 15 years, compounded annually.
ololo11 [35]

Answer:

$3489.39

Step-by-step explanation:

This question is an example of compound interest. To work this out you would first have to convert the percentage of 8% into a decimal. To do this you would divide the percentage of 8 by 100, which gives you 0.08. You would divide the percentage by 100 as percentages of a whole amount are out of 100.

The next step is to add 1 to 0.08, which gives you 1.08. This is because the question is asking to increase the amount by 8% and that as 1 is the whole amount, this means that 1.08 is 8% more than the whole amount.

Then to work out how much there will be after 15 years you would multiply the amount of 1100 by 1.08 to the power of 15, which gives you 3489.39. This is because to work out 8% would only work it out for one year however for compound interest you would need to work out 8% extra and then the next year work out the 8% of the new total.

1) Divide 8 by 100.

8/100=0.08

2) Add 1 to 0.08.

1+0.08=1.08

3) Multiply 1100 by 1.08 to the power of 15.

1100*1.08^{15} =3489.39

3 0
3 years ago
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