exam Maths Puzzle Numerical Ability

4x-3x-1/2=3x+1/2-22x-1

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exam Other Question

The graph of y=3x^2+12x+19 is a parabola that opens in the direction__up/down____. It has vertex ____________, y-intercept ___________, and ______________real roots. The area of a school gym is 600 ft square. The gym is 25 ft long. How wide is the gym?

A. 10 FT
B. 20 Ft
C. 24 FT
D. 30 FT
PLease show me how to arrive at the answer.
Thanks