exam Maths Puzzle Numerical Ability

simplify:

3/x + 1/x+4 divided by 1/x + 3/x+4

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exam Other Question

For each equation find teh x - intercept

y = x^2 + x - 6
Please help me perform the operation indicated. Thank you

7 sqr root 24 + sqr root 90 - 8 sqr root 54