Evaluate: -18 - 11 (-2)
= -18 - (-22)
= 4
is this right?

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

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 expression is equal to (f+g)(x)?