exam Maths Puzzle Numerical Ability

5x+7y=b
mx+y=22

Find the vaule of m and b in the following systems so that the soultion to the system is (-3,4).

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exam Other Question

a 48 cm wire is to be cut into two pieces. One piece must be 10 cm longer than the shorter piece. How long should each piece be? From the information in the table providing values of f(x) and g(x),
evaluate ( f o g)−1(2) .

x 1 2 3 4 5
f(x) 3 4 5 1 2
g(x) 5 4 2 3 1

a. 1
b. 2
c. 4
d. 5