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Gnom [1K]
3 years ago
6

explain why multiplying the numerator and denominator of a fraction by the same number results in an equivalent fraction

Mathematics
1 answer:
Tomtit [17]3 years ago
8 0
Think:  You're treating the numerator and the denom. in precisely the same way.  In doing so you are NOT changing the value of the fraction, only the appearance.

Example:  start with 2/3.  Mult num. and den. both by 7:  14/21.

2/3 and 14/21 result in precisely the same decimal fraction, showing that the latter set of fractions is equivalent to the former set.

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Lf x+1/x=12 then find the value of x3+1/x3​
Tresset [83]
Answer:

Explanation:

First we find what x is:
x + 1/x = 12
x + 1 = 12x
1 = 12x - x
1 = 11x
1/11 = x
Or x = 1/11

Plug x value in x^3 + 1/x^3

(1/11)^3 + 1/(1/11)^3
= (1^3/11^3)+ 1/(1^3/11^3)
= (1/1331 + 1)/1/1331
= (1/1331 + 1331/1331)/1/1331
= 1332/1331 x 1331/1
= 1332/1
= 1332

Therefore, x^3 + 1/x^3 = 1332
4 0
3 years ago
The sum of ten consecutive whole even numbers is 1190
olga2289 [7]
X + x+2 + x+4 + x+6 +x+8 + x+10 + x+12 + x+14 + x+16 + x+18 = 1190
Now simplify
10x + 90 = 1190
10x = 1100
x = 110
Now plug in 110 for x
5 0
3 years ago
Help me plz need smart people
Genrish500 [490]
The answer to 9 is 87.

The answer to 10 is x=91, y=89, and z=31

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8 0
3 years ago
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Help!!! I don’t get this
Goshia [24]

i think u gotta multiply

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