What’s a and b in these 3? 20 points + brainliest

1) a 130° - (360 - (50×2)) /2

B 50° - opposite angles

2) a 25° - 90° - 65 = 25 °

B 270° - 360° - 90° = 270°

3) a ) 60° - 180° - 120° = 60° (there are 180° in a straight line)

B) 90° - 180°-90° = 90°

16.9 times 2.85

step-by-step explanation:

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.