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andreyandreev [35.5K]
3 years ago
6

(20x2-7x-3)-(9x2-12x-5)

Mathematics
1 answer:
BARSIC [14]3 years ago
5 0

Answer:

-17

Step-by-step explanation:

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What point on the line y=9x+8 is closest to the origin
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to find the point, find the location

realize that the shortest line that crosses through the origin and y=9x+8 is perpendicular to y=9x+8

perpendicular lines have slopes that multiply to get -1

y=9x+8 has a slope of 9

9*m=-1, m=-1/9

the slope of the mystery line is -1/9

since it passes through the origin, the y intercept is 0

y=(-1/9)x is the equation of the line from the point to the origin

find the intersection of this line and the original line

set them equal to each other

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multily both sides by 9

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minus 81 both sides

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divide both sides by -82

x=-36/41

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y=(-1/9)(-36/41)

y=4/41

the point is (\frac{-36}{41},\frac{4}{41})

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3 years ago
The diagonals of an isosceles trapezoid are represented by x+10 and 2x+5.what is the value of x?​
DanielleElmas [232]

Answer:

x=5

Step-by-step explanation:

since it’s isosceles trapezoid, diagonals are equal.

x+10=2x+5

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Add and reduce 2/7+ 16/21=
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The pic is here , just the question wouldn’t show up right. Any help ?
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Step-by-step explanation:

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Cqn someone answer this?​
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