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#10 please help basic algebra!

#10 please help basic algebra!-example-1

1 Answer

5 votes

Answer:

9 ft.

Explanation:

Your work for #8 and #9 is fantastic. What neat, clear writing!

The table in #10 shows three points on a line, (0, 3), (10, 5), and (15, 6).

Get an equation for the line using any two of the points.

Let's use (0, 3) and (10, 5).

Slope
m=(5-3)/(10-0)=(1)/(5)

An equation for the line is


y-3=(1)/(5)(x-0)\\y=(1)/(5)x+3

Remember, x represents time in minutes, and y represents depth of oil in the tank in feet.

When the time is 1/2 hour (that's 30 minutes!),

x =30 and


y=(1)/(5)(30)+3=6+3=9 \text{ ft}

User Andy Baker
by
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