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Stolb23 [73]
3 years ago
11

-3/4 + (-3/4)

" id="TexFormula1" title=" \frac{ - 3}{4} + \frac{ - 3}{4} " alt=" \frac{ - 3}{4} + \frac{ - 3}{4} " align="absmiddle" class="latex-formula">
Mathematics
1 answer:
nika2105 [10]3 years ago
3 0

Firstly, since these two fractions have the same denominator, add the numerators up: \frac{-6}{4}

While it appears that the answer is -6/4, you can further simplify it by dividing the numerator and denominator by 2: -\frac{6}{4}\div\frac{2}{2}=-\frac{3}{2}

<u>Your answer is -\frac{3}{2}</u>

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The average reading score on certain tests is given by y = 0.153x + 255.4, where x is the number of years past 1970. In what yea
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Average reading score is given by the expression,

        y = 0.153x + 255.4

Here, x in the number of years past 1970.

To find the year in which the average reading score is 259.378, substitute the value of 'y' in the given expression.

y = 0.153x + 255.4

259.378 = 0.153(x) + 255.4

0.153x = 259.378 - 255.4

0.153x = 3.978

x = \frac{3.978}{0.153}

x = 26

That means given average reading score 259.378 will be 26 years after 1970.

       Therefore, 1996 is the year in which the average reading score will be 259.378.

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