Please please help please please ASAP please I'm begging you please I have 10 minutes please y'all help please any ACE that can help please

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

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 difference between the predicted value and the actual value