exam Maths Puzzle Numerical Ability

I am having trouble with another question for a homework assignment:
For the line 7x-4y =14, determine X intercept, Y intercept, and slope. Thank you so much

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exam Other Question
The tennis court is 78 ft long and 27 ft wide. Here is the question. If a serve is measured at 185 km per hour, how many seconds does it take for the tennis ball to travel the length of the court? Divide:

x^2 + 2x^2 + x + 12
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x + 3

Can anyone give me a hand on this, it seems to be so confusing to me! Thank you very much