Step-by-step explanation:
you need to substitute the x in (7x +2y=13) with (x=2y+11) to solve it
80x 180x8x 5x 7x 9x 2 x 1 x5 x 3 x6 x4 x3 x6 x8 + 9 - 2 Divided by 6
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We have been given that during one period extreme cold, the average daily temperature decreased degree F each day. We are asked to find number of days it will take for the temperature to decrease by 9 degree F.
First of all we will convert our mixed fraction into improper fraction.
Now we will divide total temperature change (9) by average daily temperature change () to find number of days.
Dividing a number by a fraction is same as multiplying the number by reciprocal of the fraction.
Therefore, it will take 6 days for the temperature to decrease by 9 degree F.