exam Maths Puzzle Numerical Ability

what is the range for the function {(1,3),(5,7),(9,11)}

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exam Other Question

The plowed are of a field is a rectangle 80 feet by 120 feet. The owner plans to plow an extra strip of uniform width on each four sides of the field, in order to double the plowed area. How many feet should he ass to each dimension? (Use 10 steps)
Given: a and b intersect
Angle 1 is congruent to angle 2

Prove: a is perpendicular to b

Pls. use the two column proof...
The statement and the reason for th