Answered

Explore a vast range of topics and get informed answers at IDNLearn.com. Discover detailed answers to your questions with our extensive database of expert knowledge.

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.​

Sagot :

RealGiveawayidn

Answer:

x + Y = 39 or x = 39-y

20x + 50y = 1.40

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

I hope it helps.

Sqdancefanidn

Answer:

  12 50p coins were collected

Step-by-step explanation:

Let x represent the number of 50p coins. Then 39-x is the number of 20p coins. The total value of coins collected was ...

  20(39-x) +50(x) = 1140

  780 +30x = 1140 . . . . . . . simplify

  30x = 360 . . . . . . . . subtract 780

  x = 12 . . . . . . . . . divide by 30

12 of the 50p coins were collected.

__

39 -12 = 27 of the 20p coins were collected.

We greatly appreciate every question and answer you provide. Keep engaging and finding the best solutions. This community is the perfect place to learn and grow together. Thank you for choosing IDNLearn.com for your queries. We’re committed to providing accurate answers, so visit us again soon.