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Question

Write and expression using absolute value to represent finding the distance between -3 and -7

Answer 1

| -3 - -7 |

= | -7 - -3 |

which also = | -3+7 | = |-7 +3) = | -4 | = | 4| = 4

absolute value is always positive

|x| = x if x is positive

but |x| =-x if x is negative

also |x| = the positive square root of x^2