(2j+7)(2j−7)
=(2j+7)(2j+−7)
=(2j)(2j)+(2j)(−7)+(7)(2j)+(7)(−7)
=4j2−14j+14j−49
=4j2−49
Answer:
10
Step-by-step explanation:
the sudents were put in 10 equal groups
10x6=60
I could be wrong, but I'm pretty sure it would be 26 wins for every 1000 plays
The sum of the first four terms of the series would be c. -102