exam Maths Puzzle Numerical Ability

Find the time required for an object to fall to the ground from a guilding that is 1400 ft. high using

t = 1/4 with the square root of s

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exam Other Question

write an equation in slope-intercept form for the line that stisfies each set of conditions.

slope 1, passes through (2,5)
I am a little confused, can someone help me?

LCM of 3(y-7)and 21(y-7)