Si se utiliza 2 quintos de pintura para pintar 3 cuartos de linea ¡cuantos dicilitros de pintura se utilizaran un metro de linea porfa : c lo se soy noob : c

Which of the following is true for the relation f(x)=2x^2+1

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18