Find the value of x. this is a 30-60-90 triangle. this is worth a lot of points

Keith bought a soft drink for 4 dollars and 9 candy bars .he spent a total of 31 dollars .how much did each candy bar cost?

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r