exam Maths Puzzle Numerical Ability

Factor completely.
49x^2 - 9

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exam Other Question

Can someone please help me out with this: I am supposed to find the length x. Express your answer in simplified radical form. the triangle is 51 ft on one side, 45 ft on the other side, then there is x. Can someone help me solve for rate and round to the nearest tenth percent as needed? I know that rate= portion/base.

1. -----of 80 is 50

2.0.9 is-----of 2.25

Thanks