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3 years ago

Solving systems by substitution

Mathematics

1 answer:

romanna [79]3 years ago

7 0

Tank 1: v = 1540 - 6m

Tank 2: v = 236 + 6m

109 minutes, less than two hours, since two hours is 120 minutes (60 minutes in one hour, times 2)

Set them equal to each other to find out when they will have the same number of gallons: 1540 - 6m = 236 + 6m

1304 = 12m
108.667 rounded to the nearest minute is 109 minutes, which is the answer.

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3 years ago

yanalaym [24]

Answer:

$A=\pi \frac{d^2}{4}$

Step-by-step explanation:

The typical equation for the area of a circle is $A=\pi r^2$ . Since the answer choices are in terms of d, the diameter of the circle, you will need to find r in terms of d.

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Now that you have an equation for r in terms of d, you can substitute r with $\frac{d}{2}$ from the original equation.

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