Add and simplify. Write the answer as an improper fraction as needed.
+ 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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In a gambling game, on every play, there is a 0.1 probability that you win $7 and a 0.9 probability that you lose $1. What is the expected value of this game? Is the game fair?
A. +$2; Yes B. $0.20; Yes C. ?$2; No D. ?$0.20; No
Mathematics
Insert three geometric means ( two positive and one negative ) between - 84 and - 6,804.
A. 250, - 754, 754 B. 252, - 755, 754 C. 252, - 756, 2,268 D. 253, 755, - 2,267
Mathematics
Use a calculator to find the acute angle between the planes to the nearest thousandth of a radian.2x - 8y + 9z = -5 and -6x - 9y + 3z = 4
A. 1.549 rad B. 0.883 rad C. 0.627 rad D. 0.688 rad
Mathematics
Provide an appropriate response.Using ?ABC~?AED, find the length of DE.
A. 
B. 48
C. 15
D. 9.6
Mathematics