The diagonal is the hypotenuse of a right triangle with the sides of the square as legs.
By Pythagoras (s = side)
s^2 + s^2 = 15^2
2s^2 = 225
s^2 = 112.5
s = sqrt(112.5)
s = 10.6 cm (to the nearest tenth)
33 dollars. The tip is 3 dollars, and that to 30 dollar dinner bill and the whole bill will be $33.
Answer:
-X – 10=-1(x+10) is your answer