Draw a square whose sides are represented by x=4, x = -4, y = 4 and y = -4.
find one of the side of a square is representated by 4x-7 and the adjacent side is represented by 3x+5, find the value of x.
Four fair dice D1,D2,D3 and D4 each having six faces numbered 1, 2, 3, 4, 5 and 6 are rolled simultaneously. The probability that D4 shows a number appearing on one of D1,D2 and D3, is ?