exam Maths Puzzle Numerical Ability

hi,

i am having a difficult time finding the answer to this problem. can you please help me? simplify [(6x-1)-2x]-[(12x-7)-(4x-5)]. thank you!

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exam Other Question

I have been helping my son with his homework and I myself need help w/ this problem.

Points X,Y, and Z are collinear, w/ point X between points Y and Z. If XY = 14.8 and YZ = 18.2, find XZ.

Thank you for the help.

Angela
Use 3.14 for the value of , and round your answers to two decimal places, where applicable.
A rectangle is 11 inches long and 7 inches wide. What is its area?