Anyone just up to a simple conversation i mean even an argument?

Can you draw an isosceles triangle with only one 80 degree angle?

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

What value of x is in the solution set of 4x – 12 s 16 + 8x?