exam Maths Puzzle Numerical Ability

Find the percent of the number.

50% of 22

Any help with this equation would be greatly appreciated.

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exam Other Question

Please help with this problem

Solve the linear systems by any method.

Eq 1 states: 1/3x - 3/4y = -1/2

Eq 2 states: 1/6x + 1/8y = 3/4
I think I did this right, but I am not totally sure. Could you please tell me if I did?

Solve for m

S=under the radical 8mn

squared(S=under the radical 8mn)squared
S squared= under the radical 8m(n)squared

Please help me.