Michael gets test grades of 73, 77, 82, and 86. he gets a 93 on his final exam. find the weighted mean if the tests each count for 15% and the final exam counts for 40% of the final grade. round to one decimal place.

84.9

Step-by-step explanation:

The weighted mean is given by the sum of the products of each grade by its respective weight. If the first four grades correspond to 15% of the final grade each, and the final exam is equivalent to 40% of the final grade, Michael's final grade is:

Michael's final weighted mean is 84.9.

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3