What is the answer to 15 and 18? pls help it will mean a lot:)

Answer and Step-by-step explanation:

15.   or

-1.35 = -135/100 =  (Mixed number)

Multiply the number by 100, then divide the number by 100 (but keep it in fraction form).

-1.35 x 100 = -135

=

(Mixed Fraction = . To check, multiply the 20 by the 1, then add 7, to get -27/20)

18. or

4.45 = 49/11 =

4.4545.....

Multiply the number by 100 (because there is 2 numbers being repeated.

445.4545....

Now subtract by the original number.

445.4545....

-   4.4545....

441.00

Write this as an equation:

(100 x fraction) - fraction = 441           (100 x fraction) - fraction = 99 x fraction

99 x fraction = 441   (Divide both sides by 99)

fraction = (which simplifies down to )

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step-by-step explanati∵∵∴∴on:

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square