Suppose that, for a certain mathematics class, the scores are normally distributed with a mean of 75 and a standard deviation of 6. the teacher wishes to give a's to the top 5% of the students and f's to the bottom 5%. the next 15% in either direction will be given b's and d's, with the other students receiving c's. find the bottom cutoff for receiving an a grade. (you may need to use the standard normal distribution table. round your answer to the nearest whole number.)

84.87

Step-by-step explanation:

Let X be the Math score of the mathematics class referred

Then given that X is N(75,6)

Or is N(0,1)

For z score top 5% cut off score is from 1.645

Corresponding X score can be calculated from this

Whoever got about 84.87 will be given A grade.

the bottom cutoff for receiving an A grade.

=84.87

multiple all that

step-by-step explanation:

27×17

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.