Select all the correct answers. Which operations can be applied to a matrix In the process of Gauss-Jordan elimination?
replacing a row with twice that row
replacing a row with the sum of that row and another row
o replacing a row with three times another row
swapping rows
replacing a row with the absolute values of that row

v,jhvljh,b.b; hk; ljujb,vuvccklokll; k,m,km,

step-by-step explanation:

b

step-by-step explanation:

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).