chinchintakemys1 chinchintakemys1

01-12-2017
Mathematics

contestada

Evaluate 4(2a - b) when a = -1 and b = 5

A -48
B -28
C -12
D 32

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altavistard altavistard

02-12-2017

I'd suggest you enclose -1 and 5 within brackets as shown:

4( 2[-1] - [5] ). Do the work within parentheses FIRST: 4( -7 ).
Then multiply as indicated: -28

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