-5.8 + (-2.5) = -8.3
since both the number are negative you simply add the numbers and use the negative sign.
You have known the formula Length of base is la division of Area and a haft of the height.
So we have 3

or


and

have fun
It would be D
Hope this helps! :)
~Zain
When parentheses are around a number being squared, the output value will always be positive.
For example: -2² vs (-2)²
-2² means the <em>negative of the square of two</em>, or -4
(-2)² means the <u /><em>square of negative two</em>, or 4
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