Simplify. Write the answer with positive exponents.
A. y10
B. y14
C. 
D. 
Answer: D
Mathematics
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Use a calculator to verify the value found by using the double-angle formulas.Find cos 298° directly and by using functions of 149°.
A. -0.8999 B. -1.7144 C. 0.4695 D. -0.8572
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Determine if the parabola whose equation is given opens upward or downward.y = x2 - 3x - 9
A. downward B. upward
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Solve the problem.The graph of the equation y = a sin bx is shown, where b is a positive constant. Estimate the value of a.
A. 0.5 B. -1.5 C. 1.5 D. -3
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Evaluate the expression according to the replacement value given.
; replace w with 4.
A. 6 B. 8 C. 2 D. 20
Mathematics