Yu Xing paid 3.60 dollar for 2 pens after a 10 percent discount .What was the usual price of 1 pen.

2 $

Step-by-step explanation:

let the original price be x

price after 10% discount = 3.60$

The original price of 2 pens is 4$

original price of one pen = 4/ 2

= 2 $

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

i need more details sorry

step-by-step explanation: