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natita [175]
2 years ago
5

Find the sum. 7x + 15x =

Mathematics
2 answers:
kotegsom [21]2 years ago
7 0

Answer:

22x

Step-by-step explanation:

7x + 15x

(7 + 15)x

22x

DiKsa [7]2 years ago
3 0
22x is the answer to the question
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4 0
2 years ago
Apply the laws of exponents, calculate the result and express the result in scientific notation, and as a decimal: (8.1*10^-4)^2
AfilCa [17]
<h3>Answer:</h3>
  • the result in scientific notation is 6.561×10⁻⁷
  • the result as a decimal is 0.000 000 656 1
<h3>Explanation:</h3>

The rules of exponents say the exponent outside parentheses applies to each factor inside parentheses.

... (8.1*10^-4)^2 = 8.1^2 × (10^-4)^2

... = 65.61 × 10^-8

... = 6.561 × 10^-7 . . . . adjust to scientific notation with one digit left of the decimal point

The exponent of -7 means the decimal point in the decimal number is 7 places to the left of where it is in scientific notation. That is ...

... 6.561 × 10^-7 = 0.0000006561

4 0
3 years ago
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Marat540 [252]
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3 years ago
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