Compare the graphs of y = x and y = 2x. How are they related?

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

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

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)