Used cans inside = 19
Used cans outside = 88
107-19 = 88
8 and 2: 8+8+2+2
7 and 3: 7+7+3+3
6 and 4: 6+6+4+4
=20
The correct answer is 2x(5x^2+4x-3)
Answer:
a) next one is previous one -3
b) next one is 3 times previous one
To calculate how many points this person got, take 90% of the total:
0.9(70) = 63
A test score of 90% is 63 points out of 70.
