What is the equation of the line that has a slope of 5 and a y-intercept of -7

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?

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Point a (7,3) is translated to a'(16,-9). which rule describes the translation?