On a test that has a normal distribution, a score of 25 falls one standard deviation above the mean, and a score of 15 falls one standard deviation below the mean. Determine the mean of this test.

the least common denominator is 40

correct choice is a

step-by-step explanation:

the equation of the line passing through the points and is

thus, the equation of the line that passes through the points (0, -6) and (-3, 0) is

look in attachments

step-by-step explanation:

a = (-2, 0)

b= (-4, 0)

c = (-5,2)

d = (-1,2)