The quotient of a number and -6 is at least 12

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Me! i will mark brainliest! i don't get polynomials and all that other stuff. so this question is really hard. multiply and simplify.(x - 4) (x^2 – 5x – 6)show your

Use sigma notation to represent the following series for 9 terms.