a car park charges 1.50 to each car entering. the car park only accepts £1 coins and 50p coins. here are the coins collected on a particular day. number of £1 coins: 172 number of 50p coins:256 making the assumption that all drivers paid the exact amount due on that day, work out the percentage of drivers that paid with three 50p coins

Subtract the amount of £1 coins from 50p coins:

256-172 = 84

84/3 coins = 28 people paid with 3 coins.

172 people paid using £1 coins

172 + 28 = 200 total people

percent who used 3 coins = 28/200 = 0.13 x 100 = 14%

14%

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

step-by-step explanation:

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