(4,-6), y=-3 over 4x+1

What point is the projection of q on a) r b) s c) t

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

How can writing phrases as algebraic expressions you solve problems?