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Write an expression using subtraction to find the distance between the two divers. (5 points) Show your work and solve for the distance using additive inverses. (5 points)
do you know the distance between -2.5 and 0?
ok and what is it?
and what is the distance between 0 and 1.5?
well distances are positive or zero
so I think you mean to say 2.5
yes they are
the distance from -2.5 to 0 is 2.5 the distance from 0 to 1.5 is 1.5 the distance between -2.5 and 1.5 is the sum of the distances from -2.5 to 0 and 0 to 1.5
-4 or 4
I thought you were looking for distance what is the negative number there for?
to represent the A distance from the ship wreck
i wrote this as an answer
A = -2.5 B = 1.5 - 2.5 - 1.5 = - 4 This number is also known as the opposite (number), sign change, and negation. so by using addictive inverse i am basically changing the 1.5 into -1,5 so, - 1.5 + - 2.5 = - 4
am i wrong?
i think i am
anyways the distance from -2.5 to 0 can be found by doing 0-(-2.5) and the distance from 0 to 1.5 can be found by doing 1.5-0 and the distance from -2.5 to 1.5 can by found by adding those distances \[(1.5-0)+(0-(-2.5)) \\ (1.5)+(-(-2.5)) \\ 1.5-(-2.5)\] we have written the subtraction expression they seeked
we can write it to an equivalent addition expression by using the fact that -(-2.5)=+2.5 so 1.5-(-2.5)=1.5+2.5
so 4 right?
yes -4 doesn't makes sense distance is only positive or zero