exam Maths Puzzle Numerical Ability

Can you help me with this problem...solve the following system of linear inequalities by graphing...I did not have button on my computer which shows the line underneath the greater and less than sign in the problem.

x-2y<4
x>1

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exam Other Question

I was not sure what type of problem this would be so I put what i thought was close.

Which of the following relations represents a function?
a. (0,4) (0,-3) (1,-2)
b. (1,1) (1,2) (1,3)
c. (2,-1) (2,1) (2,3)
d. (-1,2) (1,2) (3,2) Please help me with this homework question! Find the quotient. Write your answer using exponents. 15 to the 21st power divide by 15 to the 13th power.