exam Maths Puzzle Numerical Ability

What are the lengths of line LM, line MN, and line LN

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exam Other Question

When a number of units are sold, the price of each unit (in dollars) is given by
P= -x/2+75. Find the unit price when the following quantities are sold:2,7,9,11.
McGraw Hill 6th edition, chapter 6. problem # 48. Thankyou ever so much!!
2(8-10)^2-5(1-6)^2

(-7)(-3)-(4)(3)/3[7/(3-10)]