Answer:
B) 29 +4a
Step-by-step explanation:
for this question we need to expand the brackets. to do this you would times everything in the brackets separately by 4, 4 times a which is 4a and 4 times 5 which is 20.
this would creat a sum of 9+4a+20
now we can add together the like terms which in this case are 20 and 9 making the whole sum 29 +4a
this is how you expand the brackets.
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