exam Maths Puzzle Numerical Ability

Find the foci of a hyperbola with the equation 9y2 - 72y - 16x2 - 64x - 64 = 0

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exam Other Question

Which of the following is not a rational number?

a. -4
b. 1/5
c. 0.833333333..........
d. 0.45
e. squareroot 2 Please help me with this problem, it would be so appreciated. This algebra is confusing me. PLEASE HELP ME!!!

What is the area in square feet of a room that is (2x-1) feet wide and (7x+3)feet long?