Find the value of given expression ?

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The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

What is the value of x when x + 7 = 21?

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)