Factor the polynomial by grouping.x2 + 4x + 5x + 20
A. (x - 4)(x - 5)
B. (x - 4)(x + 5)
C. (x + 4)(x + 5)
D. prime
Answer: C
Mathematics
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Solve by any method. If there is not one solution to a system, state why. x - 4y = -28-4x - 5y = -56
A. (4, 8) B. (-4, 9) C. (3, 9) D. (3, 8)
Mathematics
Determine whether matrix B is the inverse of matrix A by finding the product AB.A = 
, B = 
A. B = A-1 B. B ? A-1
Mathematics
Factor completely. If the polynomial is prime, state so.9x2 - 16
A. (3x + 4)2 B. (3x - 4)2 C. (3x + 4)(3x - 4) D. prime
Mathematics
Determine if the given value of the variable is a solution to the equation.x - 7 = 2; 9
A. solution B. not a solution
Mathematics