Which number has the same value as 30 tens

What is not true about kl and mn? what is mn? (show )

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)

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !