How do you put parentheses while also using pemdas in 5 plus 4 minus 5 plus 3 times 8 divided by 2 to get an answer of 1

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Solve for x in the equation x2 - 12x + 36 = 90. x= 6+3x/10 x=6+2/7 x= 12+3/22 x = 12+3/10

Rachel is baking a cake but does not know if she wants to make a round or a square cake which cake has a larger area a round 8 inch cake or a square 9 inch cake