exam Maths Puzzle Numerical Ability

I am frustrted with my homework assignment, Can someone please help me with this, I need to solve and check the sq rt of x+4=3

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exam Other Question

How do find the x-intercept and the y-intercept of 8x-2y=5 Can you please help me with this i do not understand it.

Solve using the square root property

5x^2 = 100

thank you
julie