Which of the following is an infinite set?

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?

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Which additional information, if true, would to prove that δlmp ≅ δnmp by hl? check all that apply.