exam Maths Puzzle Numerical Ability

HELP
1.
Substitution Method:
7x + 3y = -9
-6y + y =22
Find the solution?

2.
Solve and Graph
2x -14 _< -7 or x -4 _> 1
Solution is {x/x _< ? or x _> ?}

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exam Other Question

Solve the following system of linear inequalities by graphing.
x + y < 5
0 <= y <= 3
x >= 1
Can someone out there help me solve this problem?

I need to find the mode on this set of numbers:

41, 43, 56, 67, 69, 72

Thank you,
sher