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tester [92]
3 years ago
6

What is x 3x+(2x-12)+40-180

Mathematics
2 answers:
Nesterboy [21]3 years ago
7 0

Answer:

x = 152/5 or x = 30.4 decimal

Step-by-step explanation:

Solve for x:

5 x - 152 = 0

Add 152 to both sides:

5 x + (152 - 152) = 152

152 - 152 = 0:

5 x = 152

Divide both sides of 5 x = 152 by 5:

(5 x)/5 = 152/5

5/5 = 1:

Answer:  x = 152/5

Leviafan [203]3 years ago
4 0

Answer:

5x-152

Step-by-step explanation:

3x+(2x-12)+40-180

3x+2x-12+40-180

5x-12+40-180

5x+28-180

5x-152

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trasher [3.6K]
60 = a * (-30)^2
a = 1/15
So y = (1/15)x^2


abc)
The derivative of this function is 2x/15. This is the slope of a tangent at that point.
If Linda lets go at some point along the parabola with coordinates (t, t^2 / 15), then she will travel along a line that was TANGENT to the parabola at that point.
Since that line has slope 2t/15, we can determine equation of line using point-slope formula:
y = m(x-x0) + y0
y = 2t/15 * (x - t) + (1/15)t^2
Plug in the x-coordinate "t" that was given for any point.


d)
We are looking for some x-coordinate "t" of a point on the parabola that holds the tangent line that passes through the dock at point (30, 30).
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y = 2t/15 * (x - t) + (1/15)t^2
And plug in the condition that it must satisfy x=30, y=30.
30 = 2t/15 * (30 - t) + (1/15)t^2
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