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During a period of extreme cold, the average daily temperature dropped decreased by 112°F each day. How many days did it take for the temperature to decrease by 9°F? Which equation would you use to find the solution? I need help

Sagot :

MrRoyal

Answer:

6 days

Step-by-step explanation:

Given

[tex]Rate = -1\frac{1}{2}^\circ F[/tex] -- Negative because it decreases

[tex]Final\ Temperature = -9^\circ F[/tex] -- Negative because it still decreases

Required

Determine the number of days

Let the number of days be d.

So:

[tex]Rate * d = Final[/tex]

[tex]-1\frac{1}{2} * d = -9[/tex]

[tex]1\frac{1}{2} * d = 9[/tex]

Convert to improper fraction

[tex]\frac{3}{2} * d = 9[/tex]

Make d the subject

[tex]d = \frac{9 * 2}{3}[/tex]

[tex]d = 3 * 2\\\\d = 6[/tex]

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