exam Maths Puzzle Numerical Ability

How do I find the slope of a line with just an equation? ex: 3x+y=7

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exam Other Question

Please help solve the following questions from ch. 5 exersie 5.5
thanks,
Sarah
A can in the shape of a right circular cylinder is required to have a volume of 700 cubic centimeters. The top and bottom are made up of a material that costs $.08 per square centi