What is the area of a triangle (easier solution)

Original question:





Let's first sketch the lines x = 4 and y = 5


To find the point where y = (-3/4)x + 20 intersects the line x = 4, replace x with 4 to get: y = (-3/4)4 + 20 = 17
So the point of intersection is (4, 17)

To find the point where y = (-3/4)x + 20 intersects the line y = 5, replace y with 5 to get: 5 = (-3/4)x + 20
When we solve for x, we get x = 20
So the point of intersection is (20, 5)

Add this information to our sketch:


From here, we can determine the length of the right triangle's base and height:


Area = (1/2)(base)(height)
= (1/2)(16)(12)
= 96
= E

Cheers,
Brent

melguy wrote:Thanks both of you for your help!

Brent - you mentioned about posting the image within the question. I am not sure how can i do it?

Hey melguy,

Use the "add image" option. This, I believe, makes the image viewable for those logged in and for those not.

So, how many more days until your test?

Cheers,
Brent

I predict great things!

Cheers,
Brent