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Pie
3 years ago
15

Does anyone know how to solve these? i need help!

Mathematics
1 answer:
exis [7]3 years ago
7 0

1/3+5/a=2/3

5/a=1/3

5=(1/3)•a

5=a/3

15=a

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A King in ancient times agreed to reward the inventor of chess with one grain of wheat on the first of the 64 squares of a chess
statuscvo [17]
Let's start by visualising this concept.

Number of grains on square:
1   2   4   8   16 ...

We can see that it starts to form a geometric sequence, with the common ratio being 2.

For the first question, we simply want the fifteenth term, so we just use the nth term geometric form:
T_n = ar^{n - 1}
T_{15} = 2^{14} = 16384

Thus, there are 16, 384 grains on the fifteenth square.

The second question begs the same process, only this time, it's a summation. Using our sum to n terms of geometric sequence, we get:
S_n = \frac{a(r^{n} - 1)}{r - 1}
S_{15} = \frac{2^{15} - 1}{2 - 1}
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Thus, there are 32, 767 total grains on the first 15 squares, and you should be able to work the rest from here.
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2 years ago
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3. The city council of a large city is considering a new law that prohibits talking on a cell phone while driving. A consumer ri
erik [133]

Answer:

The Subjects: The subject of this research are the drivers who were selected randomly to take part in the experiment

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3 years ago
Convert 30 m/s to miles per hour.<br> Use 1 mile per hour = 1.61 km/h
ss7ja [257]

Answer:

1 = 1.61

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7 0
3 years ago
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The answer is: 27.5x+1.5
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Answer:

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4 divided by 24 is 6

6x3=18

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3 years ago
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