+23-(-20)=43 how is that so?Explanation included

Mathematics

1 answer:

valina [46]2 years ago

7 0

Answer:

Well, when adding and subtracting negatives

You can change the symbol and positive or negative of the second number like

2 + (-1) is equal to 2 - 1

23 + 20 = 43

Therefore, 23 -(-23) = 43 because when you take away a debt you add to your balance.

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Where:

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$r_{1}, r_{2}$ - Length of each vector, in kilometers.

$\theta_{1}, \theta_{2}$ - Bearing of each vector in standard position, in sexagesimal degrees.

If we know that $r_{1} = 42\,km$ , $r_{2} = 28\,km$ , $\theta_{1} = 32^{\circ}$ and $\theta_{2} = 154^{\circ}$ , then the resulting coordinates of the final position of the surveyor is: