5, Chapter-6.3

Explain step by step

\fQuestion 2 Evaluate the determinant of the given matrix. log m log m A = O 21log m O 10log m O -4log mQuestion 4 Find the cofactor of the given element. a 21 6 -9 O 89 O -84 O 79Question 6 Use the formula Area = 1 N to find the area of the triangle with the given 1 vertices. Choose the + or - sign so that the value of the area is positive. Vertices are {(21, 31) , (22, 92), (23, 43) } (1, 4). (-1, 5), (-4, -5) 23 O 23 O O 23Question 7 Solve the problem. Danielle stayed in three different cities (Washington, D.C., Atlanta, Georgia, and Dallas, Texas) for a total of 22 nights. She spent twice as many nights in Dallas as she did in Washington. The total cost for 22 nights (excluding tax) was $3,100. Determine the number of nights that she spent in each city. City Cost per Night Washington $100 Atlanta $175 Dallas $150 O 4 nights in Washington, 10 nights in Atlanta, and 8 nights in Dallas ()5 nights in Washington, 7 nights in Atlanta, and 10 nights in Dallas 6 nights in Washington, 4 nights in Atlanta, and 12 nights in Dallas ()1 night in Washington, 19 nights in Atlanta, and 2 nights in Dallas