Determine the cofactor of a13 the matrix. A=[ matrix 2&-4&0\\ 6&5&7\\ 5&2&0 matrix ]

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!