Answer:
Let the cost of a blouse be x.
Then, the cost of a dress would be 3/4 times the cost of a blouse, or 3/4x.
According to the problem, Vicky paid $350 for 3 dresses and 4 blouses, so we can set up the equation:
3(3/4x) + 4x = $350
Simplifying, we get:
9/4x + 4x = $350
17/4x = $350
x = $82.35
Therefore, a blouse costs $82.35, and a dress costs 3/4 times that amount, or $61.76.