PLEASE SOMEONE HELP. I NEED THIS PLS :(

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

When is g(x) = 0 for the function g(x) = 5.23x + 4?

Which point-slope form equation represents a line that passes through (3,-2) with a slope of -4/5