Which statements are correct about quadrilaterals a. all squares are rhombuses b. all rectangles are parallelograms c. all rhombuses are trapezoids d. all four sided shapes have at least one pair of parallel sides

I'm so close to finishing all these.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.