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2 years ago

What is -6.5 / 8.5 reduced to simplest form?

Mathematics

2 answers:

Naddika [18.5K]2 years ago

8 0

Answer: -13/17

Step-by-step explanation:

lara [203]2 years ago

6 0

Answer: Step 1: Write down the number as a fraction of one:

0.05 = 0.05/1

Step 2: Multiply both top and bottom by 10 for every number after the decimal point:

As we have 2 numbers after the decimal point, we multiply both numerator and denominator by 100. So,

0.05/1 = (0.05 × 100)/(1 × 100) = 5/100.

Step 3: Simplify (or reduce) the fraction:

5/100 = 1/20 when reduced to the simplest form.

What is 0.45 as a fraction?

0.45 = 9/20 as a fraction

Step by Step Solution

To convert the decimal 0.45 to a fraction follow these steps:

Step 1: Write down the number as a fraction of one:

0.45 = 0.45/1

Step 2: Multiply both top and bottom by 10 for every number after the decimal point:

As we have 2 numbers after the decimal point, we multiply both numerator and denominator by 100. So,

0.45/1 = (0.45 × 100)/(1 × 100) = 45/100.

Step 3: Simplify (or reduce) the fraction:

45/100 = 9/20 when reduced to the simplest form.

Step-by-step explanation:

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Nadusha1986 [10]

$\bf \begin{cases}
\quad3x+2y=-9\\
-10x+5y=-5
\end{cases}$

so hmm the idea behind the elimination, is to make the value atop or below, of either variable, the same but with a negative sign

so hmmm say... we'll eliminate "y"

so... let's see, we have 2y and 5y, both positive
what do we multiply 2y to get a negative -5y, that way, -5y +5y = 0 and poof it goes

well let's see, let's try "k" $\bf 2yk=-5y\implies k=-\cfrac{5y}{2y}\implies k=-\cfrac{5}{2}$

so.. if we multiply 2y by -5/2, we'll end up with -5y

well, let's multiply that first equation then by -5/2

$\bf \begin{array}{rllll}
3x+2y=-9&\qquad\times -\frac{5}{2}\implies &-\frac{15}{2}x-5y=\frac{45}{2}\\\\
-10x+5y=-5&\implies &-10x+5y=-5\\
&&---------\\
&&\frac{-35}{2}x+0\quad=\frac{35}{2}
\end{array}\\\\
-----------------------------\\\\
\cfrac{-35}{2}x=\cfrac{-35}{2}\implies \cfrac{-35x}{2}=\cfrac{-35}{2}\implies x=\cfrac{2}{-35}\cdot \cfrac{-35}{2}
\\\\\\
\boxed{x=1}$

so.. now we know x = 1.... so let's plug that in say hmmm 2nd equation

$\bf -10(1)+5y=-5\implies -10+5y=-5\implies 5y=5\implies\boxed{ y=1}$

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3 years ago