Write an equation of the straight line which is perpendicular
to the line 2x – 3y = 5 at the point (4,1).

3x + 2y = 14

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 - 3y = 5 into this form by subtracting 2x from both sides

- 3y = - 2x + 5 ( divide all terms by - 3 )

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

= - = - = - , thus

y = - x + c ← is the partial equation

To find c substitute (4, 1) into the partial equation

1 = - 6 + c ⇒ c = 1 + 6 = 7

y = - x + 7 ← in slope- intercept form

Multiply through by 2

2y = - 3x + 14  ( add 3x to both sides )

3x + 2y = 14 ← in standard form

answer:

it will cost 480 dollars to refurbish the larger wood floor

step-by-step explanation:

as it's a ratio of 4 that costs 384 dollars, divide the price by the ratio

384 / 4 = 96 dollars

96 dollars per unit of the ratio

now to get the price to refurbish the larger wood floor, times the price by the units

96 * 5 = 480