If A=40°, B= 60° and a=12 cm find b.

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?

What is the y-intercept of the line given by the equation

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)