What are the roots of the equation x² + 6x + 13 = 0 in simplest a + bi form?

Measures of the angle of r, 31 s (x+4) t (3x+9)

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?