Let the reduced price be x
If he paid for 6 rounds, he paid 1 round at full price of $19 and 5 rounds at reduced price:
19 + 5x = 59
5x = 59 - 19
5x = 40
x = 40 ÷ 5
x = 8
The reduced price is at $8 per round.
To find the constant proportionality you would need to find the cost of one ticket which would be 9 dollars
For the second one 1 mph equals 1.6 km so i’m pretty sure it would be all of them
All triangles interior angles equal 180
So these 3 angles = 180
