Mr shah is working out the cost of the electricity he used in April Mr Shah has to pay
20p for each of the first 70 units used in April
and 10p for each of all the other units used in April.
Work out the total cost of the electricity he used in April.

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint.how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

What can you determine about the solutions of this system