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2 years ago

When might it be easier to write the percent as a fraction rather than as a decimal? Please give an example

Mathematics

2 answers:

Darina [25.2K]2 years ago

6 0

Maybe when its an easy simple fraction. For example 1/4= 25% and 1/2= 50%.

ale4655 [162]2 years ago

5 0

When your percent value is something like 75% or 50%.
75% is the same as $\frac{3}{4}$

50% is the same as $\frac{1}{2}$

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Answer:

Step-by-step explanation:

Let's find the points $A$ and $B$ .

We know that the $y$ -coordinates of both are $3$ .

So let's first solve:

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$0=4x^2+x-1-3$

Simplify:

$0=4x^2+x-4$

I'm going to use the quadratic formula, $x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$ , to solve.

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$\frac{-1 \pm \sqrt{1^2-4(4)(-4)}}{2(4)}$

$\frac{-1 \pm \sqrt{1+64}}{8}$

$\frac{-1 \pm \sqrt{65}}{8}$

Since the distance between the points $A$ and $B$ is horizontal. We know this because they share the same $y-coordinate$ .This means we just need to find the positive difference between the $x$ -values we found for the points of $A$ and $B$ .

So that is, the distance between $A$ and $B$ is:

$\frac{-1+\sqrt{65}}{8}-\frac{-1-\sqrt{65}}{8}$

$\frac{-1+\sqrt{65}+1+\sqrt{65}}{8}$

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