Which statement describes the end behavior of the function?
f(x)=x2-4/x2-9

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?