For simplifying what’s 1.(x + 2)(x +7)
2.(m - 5)(m - 2)
3.(2x+3)(x+1)
4.(5x +3)(x - 2)
5.(4m + 1)^2
6.(y - 8)(y + 8)
7.(x + 5)(x^2 + 4x -8)
8.(4x-1)(x^2 - 7x +1)
9.(3x + 2)(5x^2 - 12x - 2)

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

The result of which expression will best estimate the actual product of (-4/5) x (3/5) x (-6/7) x (5/6) (i need an expression not an answer)

By january 2014 the us population had grown to 317.3 million and the us federal debt was a reported $17.3 trillion. calculate the january 2014 federal debt per capita. (round to the hundredths place)