The manager of a grocery store has taken a random sample of 100 customers the average length of time it took these 100 customers to check out was 3 minutes. it is known that the standard deviation of the population of check out times is 1 minute. with a .95 probability, the sample mean will provide a margin of error

The graph of the quadratic function shown on the left is y = –0.7(x + 3)(x – 4). the roots, or zeros, of the function are . determine the solutions to the related equation 0 = –0.7(x + 3)(x – 4). the solutions to the equation are x =

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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.