exam Maths Puzzle Numerical Ability

write the equation of the line passing through each of the given points with the indicated slope. Give your results in slope-intercept form, where possible.
(2,-3)and (2,4)

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exam Other Question

The height h in feet of an object after t seconds is given by the function
h = -16t^2 + 30t + 3.
How long will it take the object to hit the ground? Round your answer to the nearest thousandth.

I wish that I knew how to do this problem! Use an augmented matrix to solve the linear system.
x+4y-2z=3 Step #1 [1 4 -2: 3]
x+3y+7z=1 [1 3 7 :1]
2x+9y+z=8 [2 9 1 :8]