Explain why you cannot factor the trinomial x2 – 15x + 3 A There are no factors of -15 that add up to 3.

B There are no factors of 3 that add up to -15

C It can be factored

Does anyone can help me out on dis one?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

Math i have no idea how to do a and b

Yvaries directly as x. y =90 when x=6. find y when x=13