Which of the following is the best formula for the sequence graphed below? a^n+ -n^2/(-1)^n+1 an= n^2/(-1)^n

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

Which of these angles are complementary? a. 45o and 45o b. 63o and 117o c. 45o and 135o d. 90o and 45o