Can you add and/or subtract fractions with unlike denominators? If so, how?

If the new moon happens on january 15th, what shape will it be on february 6th?

14. a body is projected with velocity vi from a. at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

How are positive ions different from neutral atoms