exam Maths Puzzle Numerical Ability

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2(5x-4)=5(2x+3)

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I think its a number line its a table with x and y i think and it asks to find the degree of the function and i have another two lined table that says find the quadratic model Two surveyors with two-way radios leave the same point at 9:00 A.M., one walking due south at 4 mi/hr. How long can they communicate with one another if each radio has a maximum range of 2 miles?