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
Thank you

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exam Other Question

Please solve and graph the inequality. thanks!

-3 < 2x - 1 < 9
Give the vector from (1, 0, 2) to (3, -2, 5).

Give a vector that has the same direction as the vector from that problem but in unit length.