rue or False. Justify your answer.(a) Suppose thatAandBarennmatrices that both have linearly independent columns. ThenAandBhave the same reduced echelon form.(b) The nullity of a nonsingular matrix can be nonzero.(c) LetAbe anmnmatrix. The dimension of the column space ofAisnand the dimensionof the row space ism.(d) SupposeAis anmnmatrix such thatAX

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a.the profit when the unit price is equal to 0b.the unit price(s) when the profit is equal to 0c.the profit when the unit price is greatestd.the unit price(s) when profit is greatest

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?