Hi, i really need help figuring two problems out.
problem 1
the perimeter of a rectangular picture is 34cm. the diagonal is 13cm. find the dimensions of this picture.
how on earth do i figure this out?
problem 2
Find the distance (correct to three decimal places) from the point (-5,-2) to the line 3x+y=8. Hint: the distance from a point to a line is the perpendicular distance.
please help me!!
The hint suggests that you'll need a perpendicular line through the point. Perpendicular to 3x + y is x - 3y. So:
(substituting in your point)
(simplifying)
This line goes from your point to your original line at a right angle. So, if you can find the intersection of these two lines, the distance would be the distance from your original point to this intersection.
Say the word if you need more past this.