Use a graphing calculator and the method of matrix inverses to solve the system. Give five decimal places, if necessary.3.2x + ?y = 
x - 7.84y = 4
A. {(0.98584, -0.29241)}
B. {(0.25269, 0.45438)}
C. {(1.25432, -0.73113)}
D. {(0, 1)}
Answer: A
Mathematics
You might also like to view...
Find the least common denominator.
and 
A. r(r + 3) B. (r + 3)2 C. r(r + 1)(r + 3) D. r(r + 3)2
Mathematics
Solve the problem.
Chelsea Donahue has a 20-year home mortgage of $71,000 at 7.50% interest and will pay $532 annual insurance premium. Her annual property tax will be $1545. Find her monthly PITI payment.
A. $723.33 B. $831.25 C. $745.34 D. $572.26
Mathematics
Find all numbers for which the rational expression is not defined.
A. x = 7 and x = -9 B. x = 0 C. x = -7 and x = 9 D. x = 8 and x = -8
Mathematics
Solve the equation.3(4x + 1) = 9 - 5(4x - 3)
A. 
B. 
C. 21
D. - 
Mathematics