x=3/10
evaluate
y=5x^2-3x+4
y=5(3/10)^2 -3(3/10)-1 (How do you evaluate this part, step by step)
y=71/20 (This is the answer)
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x=3/10
evaluate
y=5x^2-3x+4
y=5(3/10)^2 -3(3/10)-1 (How do you evaluate this part, step by step)
y=71/20 (This is the answer)
Cyberman, please consider the following.Quote:
Originally Posted by Cyberman86
$\displaystyle y=5\left(\frac{3}{10}\right)^2 -3\left(\frac{3}{10}\right)+4$
$\displaystyle y=5\left(\frac{3^2}{10^2}\right) -3\left(\frac{3}{10}\right)+4$
$\displaystyle y=5\left(\frac{9}{100}\right) -3\left(\frac{3}{10}\right)+4$
$\displaystyle y=\frac{5\times 9}{100} -\frac{3\times 3}{10}+4$
$\displaystyle y=\frac{45}{100} -\frac{9}{10}+4$
To finish the problem you must create a common denominator
$\displaystyle y=\frac{45}{100} -\frac{90}{100}-\frac{400}{100}$
$\displaystyle y=\frac{45-90-400}{100} $
Now finish and simplfy.
Last term should be + 400/100Quote:
Originally Posted by pickslides
Thanks WilmerQuote:
Originally Posted by Wilmer
I did notice that it could be the case but after reviewing this
Quote:
Originally Posted by Cyberman86
I was not sure which sign it could be? How can a +4 become a -1?
Posters should be more careful if they are serious about their education.
I only looked at these 2 lines...hence noticed the switch from + to -Quote:
Originally Posted by pickslides
I think the poster should re-supply the question. (Thinking)
I would say + because 45-90 < 0 and so for the answer to be > 0 it would need to be +400Quote:
Originally Posted by pickslides
