Mr. Bradley has found that the grades on the Algebra II final exams are
normally distributed with a mean of 64 and a standard deviation of 11.
(a)
If the passing grade is 54, what percent of the class will fail?
b)
If Mr. Bradley want only 85% of the class to pass, what should the
passing grade be?

y < -3

step-by-step explanation:

-3y - 2 > 7

-3y -2 + 2 > 7+2

-3y > 9

-3y/-3 < 9/-3   (change the inequality sign when multiplying or dividing by a negative number)

y < -3

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

  answer:

  write 548 as 500 + 40 + 8. multiply each addend by 5. then add the three products to get 2,740.