Round 7.5 to nearest whole number

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

The frequency table shows the results of a survey asking people how many hours they spend online per week. on a piece of paper, draw a histogram to represent the data. then determine which answer choice matches the histogram you drew. in order here is the.. hours online: 0-3, 4-7, 8-11, 12-15, and 16-19. frequency: 5, 8, 10, 8, 7 answer for the question is in the picture! : )

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?