1. consider the following matrix: [1 a = 1-2 11 2 3 4 1 4 0 1 1 2 01 2 2] find a basis for its null space and a basis for its column space. what is the rank and nullity of the matrix? what is rank(a)+nullity(a)?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

The diagram represents the polynomial 4x2 + 23x – 72. what is the factored form of 4x2 + 23x – 72? (4x + 8)(x – 9) (4x – 8)(x + 9) (4x + 9)(x – 8) (4x – 9)(x + 8)

Tom drove 206 miles in 3.9 hours. estimate his average speed.