Without graphing, find the line of symmetry.f(x) = -(x + 2)2 + 8
A. x = -2
B. x = 3
C. x = 4
D. x = 8
Answer: A
Mathematics
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State whether you think the difference between what occurred and what you would expect by chance is statistically significant.Of the people taking the medication, 38 out of 100 noticed improvement in their arthritis. Of the people taking the placebo, 35 out of 100 noticed improvement in their arthritis.
A. Not statistically significant B. Statistically significant
Mathematics
Simplify the square root.2
A. 4
B. 16
C. 4
D. This expression is already simplified.
Mathematics
Perform the indicated operation. Simplify your answers. 
A. 20
B. 18
C. 19
D. 19
Mathematics
Decide whether the equation defines y as a function of x.y = -x
A. function B. not a function
Mathematics