Question

a parking meter accepts only 20p coins or 50p coins.On one day, 39 coins were collected with a total value of $11.40. find how many 50p coins were collected.​

Answer 1

Answer:

x+Y=39 or x=39-y

.20x+.50y=11.40

.20(39-y)+.50y=11.40

7.80-.20y+.50y=11.40

.30y=11.40-7.80

.30y=3.60

y=3.60/.30

y=12 50p coins were collected.

x=39-12=27 20p coins were collected.

Proof:

.20*27+.50*12=11.40

5.40+6=11.40

11.40=11.40

Answer 2

brother I need reason for that not yes or no