Combine like terms.-6.53w - (-0.87 w)
A. 7.4w
B. 5.66w
C. -7.4w
D. -5.66w
Answer: D
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Use a trigonometric substitution to evaluate the integral.
A. 0.275 B. -1.099 C. 0.464 D. 0.232
Determine the vertex, focus, and directrix of the parabola and sketch its graph.x2 = 5y
A. vertex: (0, 0)
focus: 
directrix: y = - 
B. vertex: (0, 0)
focus: 
directrix: x = 
C. vertex: (0, 0)
focus: 
directrix: y = 3
D. vertex: (0, 0)
focus: 
directrix: y = - 3
The nurse has 2.82 liter(s) of a solution that is 42.4% alcohol. How many liters of pure alcohol must she add to bring the solution up to a 78.4% concentration? ? Please enter your answer as a number without the units. Round your answer to the nearest tenth.
Fill in the blank(s) with the appropriate word(s).
Factor completely.16x2 - 56x - 32
A. (16x - 8)(x + 4) B. 8(2x - 1)(x + 4) C. 8(2x + 1)(x - 4) D. (2x - 1)(8x + 32)