Find fx(x, y).f(x, y) = 
A. 
B. - 
C. 
D. - 
Answer: A
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At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent.Greater than 16.1 seconds
A. 16% B. 14% C. 2% D. 15%
Find the focus and the directrix of the parabola.y2 - 4x - 8y + 4 = 0
A. Focus: (-4, 4); directrix: x = -2 B. Focus: (-2, 4); directrix: x = -4 C. Focus: (-4, -3); directrix: y = -2 D. Focus: (1, -3); directrix: y = 7
Factor a -1 from the polynomial.-x - 4
A. -1(4 - x) B. -1(-x - 4) C. -1(x - 4) D. -1(x + 4)
Multiply.0.3(2.5a - 4.7b + 1.4c)
A. 0.75a - 1.41b + 0.42c B. 0.75a - 1.41b - 0.42c C. 0.75a - 1.41b + 0.42 D. 0.75a - 4.7b + 1.4c