exam Maths Puzzle Numerical Ability

Find the slope of the line 7x + 63y = 28.
Find the y-intercept of the equation

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exam Other Question

Compare the functions f(x) = x^7 and g(x) = 7^x by graphing both functions in several viewing rectangles.

I have to give 4 points the answer goes in to web assign like this mayb It takes a freight train 2 hours longer to travel 200 miles than it takes an express train to travel 280 miles. The rate of the express train is 20 miles per hour greater than the rate of the freight train. Find the times and rates of both trains.