Find the exact value of the expression.cos (30° + 45°)
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find the product.7a2x7(8a9x5 - 2x4 + 2a)
A. 56a9x5 - 14x4 + 14a B. 56a11x12 - 2x4 + 2a C. 56a11x12 - 14a3x11 + 2a D. 56a11x12 - 14a2x11 + 14a3x7
Mathematics
Find the least common multiple of the denominators of the fractions.
, 
A. 10,920 B. 32,760 C. 16,380 D. 2520
Mathematics
Write the interval as an inequality involving x, and illustrate the inequality using the real number line.(4, ?)
A. x > 4
B. x ? 4
C. x > 4
D. x ? 4
Mathematics
Solve the equation using the quadratic formula.3x2 + 7x + 8 = 0
A. 
B. 
C. 
D. 
Mathematics