If the trend on the preceding graph continues, what would be the most likely figure for magazine subscribers in 1985?

a. 80 million
b. 40 million
c. 34 million
d. 20 million

Can some one me with this math problem?

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is