En una confiteria calcula que nesesita usar 4 kg de harina. En el estante guardan 2 paquetes de tres cuartos de kilo ,2 paquetes de medio kilo y dos de un cuarto de kilo averiguen si la harina que tienen es suficiente .Si falta o sobra harina ,digan cual es la diferencia

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)