Solve the following word problems by first writing (an) equation(s) and then solving the equation(s). a) John is twice a

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Solve the following word problems by first writing (an) equation(s) and then solving the equation(s). a) John is twice a

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Solve The Following Word Problems By First Writing An Equation S And Then Solving The Equation S A John Is Twice A 1
Solve The Following Word Problems By First Writing An Equation S And Then Solving The Equation S A John Is Twice A 1 (191.72 KiB) Viewed 112 times
Solve the following word problems by first writing (an) equation(s) and then solving the equation(s). a) John is twice as old as Mary. Five years ago he was three times as old. What is Mary's age now? b) Knowing that energy (in Joules) is the power in Watts) multiplied by time (in seconds), what is the power of a heater if it produces 120 Kilo Joules in one minute? c) When opening her piggy bank, Mary noticed that she had 104 coins made up entirely of 20c and 5c coins that totalled exactly $10. How many of each type of coins did she have?
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