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. 90
B. 69
C. 50
D. 71
Answer: A
Mathematics
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Perform the indicated operations, expressing the answer in simplest form with rationalized denominators.
A. x3
B. 
C. x6y6
D. x3y3
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Determine whether the series converges or diverges.
 Figure 3.png)
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Solve. x + y + z = 7 x - y + 2z = 75x + y + z = 11
A. (4, 1, 2) B. (1, 4, 2) C. (1, 2, 4) D. (4, 2, 1)
Mathematics
Find the domain of the function.f(x) = ln (9x - x2)
A. 0 < x < 9 B. -9 ? x < 0 C. -9 < x < 9 D. x ? 9
Mathematics