a blender was originally sold for $90 and has been marked down $79.20 what is the percentage of discountfor the blender

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?