Mathematics: Which fraction has terminaring decimal as its decimal expansion ? a: 1/3 b: 1/5 c: 1/7 d: 1/9

Which fraction has terminaring decimal as its decimal

melanie1759

12.03.2022

The correct answer option is B. 1/5.

Step-by-step explanation:

We are given four fractions in the answer options and we are to determine whether which one of them has terminating decimal as its decimal expansion.

Terminating decimal means a decimal value which has a finite amount of numbers and has an end to it.

$\frac{1}{3} = 0.333333333$

$\frac{1}{5} = 0.2$

$\frac{1}{7} = 0.142357142$

$\frac{1}{9} = 0.111111111$

Therefore, the correct answer is 1/5.

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nadikadiaz1

19.07.2021

x = 3 ± $\sqrt{13}$

Step-by-step explanation:

x² - 6x - 4 = 0 ( add 4 to both sides )

x² - 6x = 4

To complete the square

add ( half the coefficient of the x- term)² to both sides

x² + 2(- 3)x + 9 = 4 + 9

(x - 3)² = 13 ( take square root of both sides )

x - 3 = ± $\sqrt{13}$ ( add 3 to both sides )

x = 3 ± $\sqrt{13}$

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