In which of these situations do the quantities combine to make 0? A. A car is filled with 10 gallons of gas. Half of the 10 gallons are then used on a day's drive
B. A rock climber goes 40 feet down into a valley. She then goes 40 feet up a cliff o C. Glenn spends $8 on a tutor, and then he spends $8 on a new book
D. A player in a game earns 5 points for getting an answer right. She then earns 5 points for making it around the board

b

Step-by-step explanation:

only one that makes sense lol. a is only losing half 10-5= 5. c is spending $8 twicce so it goes to -$16. d earns 10 points

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐