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Leni [432]
3 years ago
14

What is 1.2+d+0.4=9.7?

Mathematics
2 answers:
Drupady [299]3 years ago
7 0
Since your solving for d, its actually quite simple to figure out.

First:

9.7 = 1.2 + d + 0.4

Add 1.2 and 0.4 together to get 1.6

1.2 + 0.4 = 1.6

Then, subtract 1.6 from 9.7

9.7 - 1.6 = 8.1

Finally, fill in the blank for d

1.2 + 8.1 + 0.4 = 9.7

so,  d = 8.1

Hope that helps you!
Cloud [144]3 years ago
6 0
1.2 + d + 0.4 = 9.7

1.6 + d = 9.7

1.6 (-1.6) + d = 9.7 (-1.6)

d = 8.1

your answer is 8.1

hope this helps
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Show that every triangle formed by the coordinate axes and a tangent line to y = 1/x ( for x > 0)
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given a point (x_0,y_0) the equation of a line with slope m that passes through the  given point is

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Recall that a line of the form y=mx+b, the y intercept is b and the x intercept is \frac{-b}{m}.

So, in our case, the y intercept is (y_0-mx_0) and the x  intercept is \frac{mx_0-y_0}{m}.

In our case, we know that the line is tangent to the graph of 1/x. So consider a point over the graph (x_0,\frac{1}{x_0}). Which means that y_0=\frac{1}{x_0}

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\frac{1}{2}\frac{2}{x_0}\cdot 2x_0=2

So regardless of the point we take on the graph, the area of the triangle is always 2.

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