Write a linear expression with all rational coefficients such that simplifying the expression requires using associative property of addition, the commutative property of addition, the distributive property, the additive inverse property and the additive identity property

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

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step-by-step explanation: