A horizontal line intersects the y-axis at negative 2

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?

Find the value of x. round the length to the nearest tenth

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)