Which expression is equivalent to( 9x^2+2x-)a.(9x^2+2x-7)(x)+(9x^2+2x- 7)(x-4)b. x(9x^2+2x-7)-4c.-4x(9x^2+2x-7)d. x(9x^2+2x-7)+4(9x^2+2x-7)

I'm pretty sure its B. (9x2+2x-7)(x)+(9x2+2x-7)(-4)  

Because its just splitting up the (x-4) and if you add the answers together then you get the same answer as the original

Step-by-step explanation:

.19875994384

step-by-step explanation:

1699/ 8548

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)