Find the exact value of the expression.cos (30° + 45°)
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Perform the indicated operation. Write the answer in scientific notation.(4.4 × 10-5)(1.3 × 10-7)
A. 5.7 × 1012 B. 5.72 × 10-12 C. 5.72 × 1012 D. 5.72 × 10-2
Mathematics
Add.- 
A. - 
B. - 
C. - 
D. - 
Mathematics
Divide using synthetic division.
A. -7x + 8 B. x - 7 C. 5x - 7 D. -5x + 7
Mathematics
Solve the equation. Express radicals in simplest form.2x2 + 8x = -7
A. 
B. 
C. 
D. 
Mathematics