Thursday

December 18, 2014

December 18, 2014

Posted by **Santha** on Tuesday, March 16, 2010 at 2:30pm.

- calculus HELP URGENT -
**Reiny**, Tuesday, March 16, 2010 at 4:44pmDraw a line through (3,4) cutting the x-axis at (x,0) and the y-axis at (0,y)

Area = (1/2(x)(y)

using slopes,

(y-4)/-3 = +4/(x-3)

xy - 3y - 4x + 12 = 12

y(x-3) = 4x

y = 4x/(x-3)

then

A = (1/2)x(4x)/x-3)

= 2x^2/(x-3)

dA/dx = [(x-3)(4x) - 2x^2]/(x-3)^2 = 0 for a max/min of A

4x^2 - 12x - 2x^2 = 0

2x^2 - 12x = 0

2x(x-6)= 0

x = 0 or x = 6, and y = 24/3 = 8

using (0,8) and (3,4)

slope = (8-4)/-3

= -4/3

line has equation

y = (-4/3)x + 8

slope of line =

- calculus HELP URGENT -
**Santha**, Tuesday, March 16, 2010 at 4:59pm" using slopes,

(y-4)/-3 = +4/(x-3)

xy - 3y - 4x + 12 = 12 "

can you explain that part

- calculus HELP URGENT -
**Santha**, Tuesday, March 16, 2010 at 5:48pmnvr mind

Anyways thanks Reiny

- calculus HELP URGENT -
**Nkuche**, Sunday, April 18, 2010 at 7:24amFind the gradient of a line joining R(4,8) & S(5,-2).

**Answer this Question**

**Related Questions**

Calculus - PLEASE HELP Find the equation of the line through the point (3,4) ...

12th grade - Find the equation of the line through the point (3,4) which cuts ...

Calculus - I asked for help on a question yesterday and I got really good help ...

calculus - At what point on the parabola y = 1-x^2 does the tangent have the ...

calculus - a right triangle is formed in the first quadrant by the x- and y- ...

Calculus - Find an equation of the line through the point (3,5) that cuts off ...

math - Find an equation of the line through the point that cuts off the least ...

Calculus 151 - At what point in the first quadrant on the parabola y=4-x^2 does ...

math - a) What is the area of the tri-angle determined by the lines y= − 1...

math - A right triangle is formed in the first quadrant by the x- and y-axes and...