The graph of a quadratic function is shown below Which statement about this graph is not true?

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

It says factor each expression 49x-28?