(−5.2)+(−3.8)–{(−1.2)–[(−0.5)–(−0.7 )]} I don't know

-10.4

Step-by-step explanation:

Add the ones in the most parenthesis 1st

-0.5+0.7= 0.2

Then what was enclosing that

-1.2- (0.2)= -1.4

Now, find the sum of the remaining numbers

-5.2-3.8-(1.4)= -10.4 < Your Answer

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

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answer: for each 3 girls there is 2 boys . 3: 2

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