exam Maths Puzzle Numerical Ability

A rectangle has sides of 3x - 4 and 7x + 10. Find the expression that represents its perimeter.
[Perimeter = 2* width + 2*length]

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exam Other Question

Which of the following is a sixth order equations?
a. S(x)=x^5=x^6-2x+7
b. Q(x)=x^2+3^6
c. M(x)=(x^3)^3-12x+4
d. none of the above Can someone please help me with this one? Are the two lines with equations 2x + 3y = 8 and 3x + 2y = 7 parallel, perpendicular or neither? Tell (algebraically) how you know.