Question

Triangle ABC is a right triangle where angle B = 90 degrees. The coordinates of A and B are (5,0) and (2,5) if the x-coordinate of point C is 7 what is the y coordinate?

Answer 1

@austinL can you help

Answer 2

my choices are 7, 8, or 10
I was going with 7

Answer 3

What is the slope of BA?

Answer 4

-5/3

Answer 5

So the slope of the perpendicular must be ???

Answer 6

5

Answer 7

Change the slope to its reciprocal and change its sign.

Answer 8

3/5 so it (7,8) am i doing this wrong

Answer 9

Yes. 3/5 is correct.

Answer 10

So from point B (2,5) go up 3 and right 5. Where do you end up?

Answer 11

so the coordinate of point C (7,8)

Answer 12

(2, 5) up 3 would mean that you add 3 to the y coordinate.
right 5 means add 5 to the x coordinate

Answer 13

so yes. (7,8) is the point.