Perform the indicated operation. Write the result in the form a + bi.(3 + 6i) - (-9 + i)
A. 12 - 5i
B. -12 - 5i
C. 12 + 5i
D. -6 + 7i
Answer: C
Mathematics
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Find the area of the shaded region. Round results to the nearest unit.
A. 2512 ft2 B. 628 ft2 C. 2748 ft2 D. 707 ft2
Mathematics
How many distinguishable permutations of letters are possible in the word?COLORADO
A. 13,440 B. 6720 C. 4480 D. 40,320
Mathematics
Use identities to find the exact value of the expression.tan 80° - 
A. Undefined B. 0 C. 1 D. 80
Mathematics
Provide an appropriate response.For a certain system of three linear equations, the solution set is 
and 
Find the values of Dx, Dy, and Dz.
A. Dx = 65; Dy = -247; Dz = -26
B. Dx = -247; Dy = 65; Dz = -26
C. Dx = 
; Dy = - 
; Dz = - 
D. Dx = 5; Dy = -19; Dz = -2
Mathematics