Word problems

When point A and B (-3,4) are graphed, the midpoint of will be (1,2). What will be the coordinate of point A?
In 1985 the cost of clothing for a certain family was $620. In 1995, 10 years later the cost was $1000. Assuming the cost increased linearly, what was the cost in 1991?
The vertices of a rectangle are (-1,-2) (4,-2) (4,3) (-1,3). When the rectangle is graphed, what percentage lies in the third quadrant?