Solve.x = 144 ÷ 2
A. 720
B. 72
C. 70
D. 288
Answer: B
Mathematics
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Solve the application problem.A window washer accidentally drops a bucket from the top of a 64-foot building. The height h of the bucket after t seconds is given by 
When will the bucket hit the ground?
A. 32 sec B. -2 sec C. 4 sec D. 2 sec
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Perform the indicated operation.-5 - (-19) + (-11 + 18)
A. 21 B. -31 C. 7 D. -17
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Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Mathematics
Use a grapher to find the vertex or x-intercepts, as indicated, of the quadratic function.Find the vertex of the function f(x) = 0.4x2 + 2.8x + 5.8.
A. (3.5, 0.9) B. (-3.5, 0.9) C. (-1.4, 3.84) D. (3.5, 3.84)
Mathematics