A neutral oxygen atom (O) differs from an ion of oxygen (O2-) in that the atom has more electrons
more protons
fewer electrons
fewer protons

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

Which of the following contains a variable?

Which shows one way to determine the facts of x3+4x2+5x+20 by grouping