Ok so my sister needs with #2 can i have some answers !

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?

Let x = a + bi and y = c + di and z = f + gi. which statements are true?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?