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Klio2033 [76]
3 years ago
7

(7*10^x)+(7*10^y)+(7*10^z)=700070.07

Mathematics
2 answers:
Blababa [14]3 years ago
8 0

Answer:

The answers are:

(x,y,z)=

(5,1,-2)

(1,-2,5)

(-2,5,1)

(5,-2,1)

(-2,1,5)

(1,5,-2)

Step-by-step explanation:

In order to determine the answer, we have to express the final number into a addition.

The number 700070.07 may be written by:

700000+70+0.07

Then, we can express every number into a scientific notation,that is, at the form:

a*10^b

700000

a=7

b=5

7*10^5

70

a=7

b=1

7*10^1

0.07

a=7

b=-2

7*10^-^2

So, in this case, we have three numbers: 5, 1, -2. The set of values are the combination of these numbers, in total 6 set of numbers.

Finally, the possible set of values for x, y, z are:

(5,1,-2)

(1,-2,5)

(-2,5,1)

(5,-2,1)

(-2,1,5)

(1,5,-2)

Ivenika [448]3 years ago
3 0

Answer:

(x,y,z)=(5,1,-2) or (5,-2,1) or (1,5,-2) or (1,-2,5) or (-2,5,1) or (-2,1,5)

Step-by-step explanation:

700070.07 = 700000 + 70 + 0.07

700000 = 7*10^5

70 =7*10^1

0.07=7*10^-2

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Dana can type 90 words per minute.

Since, 1 minute = \frac{1}{60} hours

Therefore, number of words she can type = \frac{90}{\frac{1}{60}}

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If she types 2.6\times 10^5 words in 'x' hours.

Number of words Dana types with the given speed in 'x' hours = Speed of typing × Time

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Therefore, 5400\times x =2.6\times 10^5

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x

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Step-by-step explanation:

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steps

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(it is better simplified)

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