What is the simplified form of this expression? (3x2 + 5x − 8) + (5x2 − 13x − 5) A. 8x2 − 8x − 13 B. 8x2 + 8x − 13 C. 8x2 − x − 13 D. 8x2 − 8x + 13

What percent of the circle below is shaded?

Write the equation in general quadratic form: plz !

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample