exam Maths Puzzle Numerical Ability

Baking muffins: Chocolate muffins are baking in a 350-degree oven. Let M=M(t) be the temperature of the muffins t minutes after they are placed in the oven, and let D=D(t) be the

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exam Other Question
How do you make a equation that is parellel to a given equation? given: g is between f and h. h is between g and j.
Prove:fg + gj = fh + hj