exam Maths Puzzle Numerical Ability

Find values for m and b in the following system so that the solution to the system is (-3, 4).
5x+7y=b
mx+y=22

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exam Other Question

Determine whether this is rational or irrational:

SQRT 25
This would be rational correct? Thank you for all your help! What is the square root of 165 rounded to the nearest tenth?