17 = B (16 cm by 24 cm)
18 = B (192)
so hmmm on average on the last 7 test, you get 82, so hmmm we could say that on each of the 7 tests you got 82, so you got 82, 7 times.
now, let's say in the 8th test, you get a grade of "g", now, if we were to get an average of all 8 tests, that means the average will simply be (82*7) + "g", and we know that's 84, so

Answer:
P= 22x+10 7x+9x+6x+8+6-4 = 22x+10
when x=10, 22(10)+10=230mm
Answer:6 pens are blue
Step-by-step explanation:because 14-8=6 pens would be left and would be blue
The percentage would be 94%