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777dan777 [17]
3 years ago
9

Eight less than double a number is ten. What is the number?

Mathematics
1 answer:
otez555 [7]3 years ago
3 0

Answer:

9

Step-by-step explanation:

"8 less than double a number is ten" can be converted into an algebraic equation.

-8 + 2x = 10

Then simplify.

2x = 18 (add 8 to both sides)

x = 9 (both sides divided by two)

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What is the rational number equivalent to 1.28? The 1.28 has a line above the 28
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<span>the line over the 28 means the 28 repeats forever.
1.282828.... and so on
 let x be the rational number 1.28...
we can use this trick:
100*1.282828....= 128.282828...
(the decimal 28 part repeats) 100x = 128.28...
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the .282828... part will be subtracted away
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divide both sides by 99 to get
x= 127/99</span>
8 0
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