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3 years ago

Please help me out here I'm failing math.

Mathematics

1 answer:

natulia [17]3 years ago

8 0

Answer:

-4r - 11 = 4r + 21

-4r -4r = 21 + 11

-8 = 32 (Divide both sides by -8)

/ /

-8 -8

= -4

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Please solve the equation: -2x(-3x2^y)(2y)=?

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16. Find the value of x* 8. 2x-6 A 10 B 7 C -7 D -10

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$2x - 6 = 8$

Add sides 6

$2x - 6 + 6 = 8 + 6$

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$\frac{2x}{2} = \frac{14}{2} \\$

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The correct answer is (( B )) .

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3 years ago

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Line g passes through points (5, 9) and (3, 2). Line h passes through points (9, 10) and (2, 12). Are line g and line h parallel

icang [17]

For this case we find the slopes of each of the lines:

The g line passes through the following points:

$(x_ {1}, y_ {1}) :( 3,2)\\(x_ {2}, y_ {2}) :( 5,9)$

So, the slope is:

$m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}} = \frac {9-2} {5-3} = \frac {7} {2}$

Line h passes through the following points:

$(x_ {1}, y_ {1}) :( 9,10)\\(x_ {2}, y_ {2}) :( 2,12)$

So, the slope is:

$m = \frac {y_ {2} -y_ {1}}{x_ {2} -x_ {1}} = \frac {12-10} {2-9} = \frac {2} {- 7} = - \frac {2} {7}$

By definition, if two lines are parallel then their slopes are equal. If the lines are perpendicular then the product of their slopes is -1.

It is observed that lines g and h are not parallel. We verify if they are perpendicular:

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Answer:

The lines are perpendicular.

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