Anna earned an 84 for the first trimester of math. She earned a 87 for the 2nd trimester and a 90 for the 3rd trimester. Find the mean of her trimester grades.

87

Step-by-step explanation:

To find the mean, add up all her grades for the 3 trimesters, and then divide by the number of grades.

Total of her Grades

Add up all her grades

84+87+90

261

Divide

Then, divide the total of her grades by the number of grades, which is 3.

261/3

87

So, the mean for her trimester grades is 87

understand that i don't know the answers

will someone answer his question

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb