Question

Find the value of the expression 2x -3y +5z -7 for x =2, y =3, and z = -1 is
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Answer 1

Answer:

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Answer 2

Answer:

Clean water becomes unfit for use because of addition of They are imaginary lines drawn around earth. These lines runs from east to west direction and each line are parallel to each other. They are used to find out positions of East-west form a grid on earth's surface which is formed by the longitudes