Solve the problem.The sum of a student's three scores is 220. If the first is 15 points more than the second, and the sum of the first two is 19 more than twice the third, what was the first score?
A. 67
B. 84
C. 52
D. 69
Answer: B
Mathematics
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List all the subsets of the set given.{Siamese, domestic shorthair}
A. {Siamese}, {domestic shorthair}, { } B. {Siamese, domestic shorthair}, {domestic shorthair}, { } C. {Siamese, domestic shorthair}, {Siamese}, {domestic shorthair} D. {Siamese, domestic shorthair}, {Siamese}, {domestic shorthair}, { }
Mathematics
Find the real solutions of the equation.
- 
= 2
A. {-3} B. {2} C. {-2, 2} D. {-2}
Mathematics
Verify the identity.
= cot y - cot x
What will be an ideal response?
Mathematics
Multiply and simplify.
? 
A. 5m
B. 
C. 
D. 10
Mathematics