Lila is ordering photos online. each photo cost $0.08, and there is a shipping charge of $4.00 how many photos can lila order for $20

Having a hard time understanding this question (see attachment).

Which of the following are arithmetic sequences? check all that apply. a. 0.3, 0.6, 0.9, 1.2, 1.5, b. 2, 3, 6, 11, 18, c. 150, 147, 144, 142, d. 2, 4, 9, 16, 25,

Given: transversal t passed through parrallel lines r and s. prove: < 3 = < 6 < 4 = < 8what is the next step in the proof? choose the most logicsl approach