Perform the operation indicated. Simplify.
- 
A. - 
B. - 
C. 
D. 
Answer: C
Mathematics
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Multiply mentally.
A. 9x2 - 
B. 9x2 + 80x - 
C. 9x2 - 80x - 
D. 9x4 - 
Mathematics
Add or subtract as indicated. Simplify, if necessary.
+ 
A. - 
B. 
C. - 
D. 
Mathematics
Solve the problem.The sum of a student's three scores is 230. If the first is 19 points more than the second, and the sum of the first two is 23 more than twice the third, then what was the first score?
A. 69 B. 90 C. 50 D. 71
Mathematics
Solve.
= 
A. 
B. 
C. 
D. ?
Mathematics