exam Maths Puzzle Numerical Ability

The electricity costs of a business decreased from $12,000
one year to $10,920 the next. What is the rate of decrease?

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exam Other Question

Please help me to sketch the following line by method of Linear Function or straight lines.
7. y = (2/3)x-4
8. 8x-3y=24
9. slope=-3/4

Thanks, I am grateful for your help. bill has $3.75 in quarters,dimes,and nickels. he has twice as many quarters as dimes and three more dimes than nickels. find how much of each coin bill has.