6+(-3)=? i don't get this? would i get a negative or a positive?

What is the vertex form of f(x) = x2 + 6x + 3

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points

50 people men and women were asked if they watched at least one sport on tv. 20 of the people surveyed are women, but only 9 of them watch at least one sport on tv. 16 of the men watch at least one sport on tv. make a a two-way table and a relative frequency table to represent the data.