Use a truth table to determine whether the symbolic form of the argument is valid or invalid.q ? pp ? r----? r ? q
A. 
Symbolic argument is valid.
B. 
Symbolic argument is valid.
C. 
Symbolic argument is invalid.
D. 
Symbolic argument is invalid.
Answer: D
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Solve the problem.Consider the counterclockwise integral 
where C is a closed path in a region where Green's Theorem applies. To evaluate the integral, should one use the flux-divergence form or the circulation-flow form of Green's theorem? Explain.
What will be an ideal response?
Identify as an equation or an expression.
x + 7 - 
x - 8
A. Equation B. Expression
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
Factor the expression completely, if possible.49a3b + 42a2b + 9ab
A. ab(7a + 3)(7a - 3) B. ab(7a - 3)2 C. ab(7a + 3)2 D. Does not factor