Solve the system by the addition method.x + y = -9x - y = 14
A. {(2.5, -11.5)}
B. {(9, -11.5)}
C. {(9, 2.5)}
D. {(2.5, 11.5)}
Answer: A
Mathematics
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A computer password is made up of five characters. Each character can be a capital letter (A through Z) or a digit (0 through 9).How many different such computer passwords are there?
A. 36 × 5 B. 265 + 105 C. 536 D. 365 E. none of these
Mathematics
The circle graph below shows us how an average consumer spends money. 
What fraction of spending goes for food?
A. 
B. 
C. 
D. 
Mathematics
The sides in the pair of figures are proportional. Find the missing length(s).
Give your answers as mixed numbers if appropriate.
A. x = 11
, y = 10
, z = 5
B. x = 8, y = 9, z = 6
C. x = 11
, y = 13
, z = 5
D. x = 11
, y = 13
, z = 5
Mathematics
Write the augmented matrix for the system.
A. 
B. 
C. 
D. 
Mathematics