Which expression is equivalent to (x2 - 2x)(3x2 + 4x - 7)? O A. x2(3x2 + 4x-7) - 2x
O B. x2(3x2 + 4x - 7) - 2x(3x2 + 4x - 7)
O C. x2(3x2 + 4x) - 2x(4x - 7)
O D. x2(3x2 + 4x - 7) + 2x(3x2 + 4x - 7)

Pelle's sister is three years older than pelle the father is 5 times as old as pelle the mother was 28 when the sister was born altogether they are 98 years old how old is pelle?

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

Sum is 17 and their difference is 3