Which trinomial is the product of the binomials (2ab – b)(a + 3)?

For how answer my question this will be the last question can you answer in math subject

Which equation shows the variable terms isolated on one side and the constant terms isolated on the other side for the equation -1/2x+3=4-1/4x? a. -1/4x=1 b. -3/4x=1 c. 7=1/4x d. 7=3/4x

Acircle has a diameter of 10 what is the area of the circle? use 3.14 for pi. round to the nearest hundredth