Find a ? b.a = 5i - 9j, b = 4i + 3j
A. -7
B. 
C. -47
D. 
Answer: A
Mathematics
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Refer to a triangle ABC.Find the angles of the triangle ABC assuming that A = 2x°, B = (x + 14)°, and C = (x + 110)°.
A. A = 14°, B = 28°, C = 138° B. A = 14°, B = 28°, C = 48° C. A = 76°, B = 76°, C = 28° D. A = 28°, B = 28°, C = 124°
Mathematics
An executive invests $39,000, some at 7% and some at 6% annual interest. If he receives an annual return of $2,530, how much is invested at each rate? ? Amount at 7%: $ __________ ? Amount at 6%: $ __________
What will be an ideal response?
Mathematics
Rationalize the denominator and simplify.
A. 
B. 
C. 
D. 
Mathematics
Solve.?x? = -8.9
A. -8.9 B. No solution C. 8.9 D. 7921
Mathematics