Use substitution to determine whether the system of linear equations has no solutions, one solution, or infinitely many solutions.2x + 3y = 64x + 6y = 12
A. One
B. No solutions
C. Infinitely many
Answer: C
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Find the indicated probability.An unprepared student makes random guesses for the ten true-false questions on a quiz. Find the probability that there is at least one correct answer.
A. 
B. 
C. 
D. 
Draw a valid conclusion from the given premises.Students who watch television while doing homework jeopardize their grades. Students with grades in jeopardy get grounded. Being grounded includes being barred from watching television.Therefore....
A. Students who are grounded watch TV while doing homework. B. Students who watch TV while doing homework will not be allowed to watch TV. C. Students who watch TV will be grounded. D. Students who watch TV will be barred from watching TV.
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
Solve the inequality. Express your answer using interval notation.-15 ? -2x - 3 ? -11
A. (4, 6)
B. [-6, -4]
C. [4, 6]
D. (-6, -4)