85 x 3 = 255
first 2 test grades were 81 and 86:
81 + 86 = 167
Need to find the 3rd to have exact average 85:
255 - 167 = 88
So her 3rd test needs to make 88 to make average of 85
Double check: 81 + 86 + 88 = 255 = 85 + 85 + 85
Answer:
6 (v-3)^2
Step-by-step explanation:
6v^2–36v+54
Factor out a 6
6(v^2–6v+9)
Then factor inside the parentheses
What 2 numbers multiply to 9 and add to -6
-3*-3 =9 -3+-3 = -6
6( v-3)(v-3)
6 (v-3)^2
Answer:
I think the picture here explains you everything
hope this helped
