Factor completely.49x2 - 70x + 25
A. (7x - 5)(7x + 5)
B. (7x + 5)2
C. (7x - 5)2
D. Prime
Answer: C
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Solve the problem.The table shows the number of new cases of a certain disease among women in six consecutive years. Data are in thousands rounded to the nearest hundred.YearNew Cases (thousands)20053.020063.420074.620085.420096.0201016.1Let x = 1 correspond to 2005 and let y be the number of new cases (in thousands) among women in year x. Find a quadratic function to model the data. Round to three decimal places if necessary.
A. y = 0.623x2 - 5.645x + 8.69 B. y = 6.69x2 - 3.645x + 0.823 C. y = 0.945x2 - 5.212x + 8.921 D. y = 0.823x2 - 3.645x + 6.69
Multiply.3 ? 0
A. 3 B. 12 C. 1 D. 0
Find the numerical value of the expression for 
and 
x + 7
A. a) 25 b) 11 B. a) 28 b) 126 C. a) 3 b) 11 D. a) 11 b) 25
Use the indicated property to provide a new expression equal to the given expression. Simplify, if possible.6 + x; commutative
A. 6 - x B. -x - 6 C. x - 6 D. x + 6