Solve by completing the square x^2 + 8x – 2 = 0

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

Which of the following expressions are equivalent ?

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?