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IgorLugansk [536]
3 years ago
10

I need help by help i mean im lazy.

Mathematics
1 answer:
Y_Kistochka [10]3 years ago
6 0

Hey there! I am guessing these are separate equations so lets start with our first ...

(2.1 x 103) x (3.5 x 102) = 77219.1  

7.35 x 105 = 771.75

3.6 x 101 = 363.6

6.9 x 103 = 710.7

2.83 x 102 =288.66

A suggestion is to use * as multiplication otherwise some people may get mixed up thinking you are using a variable "x"


I hope this helped :)

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3 years ago
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Semmy [17]

Answer:

(12 2/3)/( 2 1/3)= 38/7 or 5 3/7 or 5.43 decimal

Step-by-step explanation:

Simplify the following:

(12 + 2/3)/(2 + 1/3)

Put 2 + 1/3 over the common denominator 3. 2 + 1/3 = (3×2)/3 + 1/3:

(12 + 2/3)/((3×2)/3 + 1/3)

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6/3 + 1/3 = (6 + 1)/3:

(12 + 2/3)/((6 + 1)/3)

6 + 1 = 7:

(12 + 2/3)/(7/3)

Put 12 + 2/3 over the common denominator 3. 12 + 2/3 = (3×12)/3 + 2/3:

((3×12)/3 + 2/3)/(7/3)

3×12 = 36:

(36/3 + 2/3)/(7/3)

36/3 + 2/3 = (36 + 2)/3:

((36 + 2)/3)/(7/3)

36 + 2 = 38:

(38/3)/(7/3)

Multiply the numerator by the reciprocal of the denominator, (38/3)/(7/3) = 38/3×3/7:

(38×3)/(3×7)

(38×3)/(3×7) = 3/3×38/7 = 38/7:

Answer:  38/7

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