3 years ago

How do you write 3.21 as a proper fraction?

2 answers:

tatiyna3 years ago

6 0

It would be 3 21/100 because 3 is the whole number, and .21 is twenty one hundredth. so if the question had said "write 1.60 as a proper fraction," then it would be 1 60/100. however you still would not be done. if you are able to simplify the fraction, then you should. so the answer for 1.60 would be 1 6/10, then 1 3/5.

lesya692 [45]3 years ago

3 0

You write it like 3 21/100

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densk [106]

$y=2x \newline y= x^{2} -3$

Substitue 2x for y in the second equation:

$2x= x^{2} -3$

Rearrange to $a x^{2} +bx+c=0$ form:

$x^{2} -2x-3=0$

Factor:

$(x-3)(x+1)=0$

Zeros are $x=3$ and $x=-1$

To find y-coordinates of pts of intersection, plug these x-values into first equation to get $y=-2$ and $y=6$