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Marizza181 [45]
3 years ago
7

Evaluate the expression when x = –15. –4x – 11 A. –71 B. –49 C. 49 D. 71

Mathematics
1 answer:
Usimov [2.4K]3 years ago
4 0
-4x-11. Plug -15 in for x into the equation. -4(-15)-11. That gives you 49. Therefore, making choice C correct.
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gizmo_the_mogwai [7]
Hey there! :D

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3z+18 <== equivalent expression

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I hope this helps!
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Y=-x+5 <br> x-y=-9 <br> Solve the system?
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Answer:

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Answer:

A. y=3x-10

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Step-by-step explanation:

Given:

The given line is 6x+18y=5

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Therefore, the slope of the line is m=-\frac{1}{3}.

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y=3x-10

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Now, m\times m_{A}=-\frac{1}{3}\times 3=-1. So, option A is perpendicular to the given line.

Option B:

For lines of the form x=a, where, a is a constant, the slope is undefined. So, option B is incorrect.

Option C:

On comparing with the slope-point form, we get slope as  m_{C}=3.

Now, m\times m_{C}=-\frac{1}{3}\times 3=-1. So, option C is perpendicular to the given line.

Option D:

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Now, m\times m_{D}=-\frac{1}{3}\times -\frac{1}{3}=\frac{1}{9}. So, option D is not perpendicular to the given line.

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3 years ago
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