Find the equation of the line which passes
through the point (5,-6) and is perpendicular
to the line 2x - 4y + 3 =0

y = - 2x + 4

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Rearrange 2x - 4y + 3 = 0 into this form

Subtract 2x + 3 from both sides

- 4y = - 2x - 3 ( divide all terms by - 4 )

y = x + ← in slope- intercept form

with slope m =

Given a line with slope m then the slope of a line perpendicular to it is

= - = - = - 2, thus

y = - 2x + c ← is the partial equation

To find c substitute (5, - 6) into the partial equation

- 6 = - 10 + c ⇒ c = - 6 + 10 = 4

y = - 2x + 4 ← equation of perpendicular line

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

c

-by-step explanation:

it would be c