Answer:
D
Explanation:
it is a strange question. but I guess its meaning is to identify an expression that is structured in the same way as the generic basic expression.
3×(n + 1.8)
after doing the multiplication this gives us
3n + 3×1.8 = 3n + 5.4
so, the only answer option including 5.4 is D.
it would mean that 3n = 3.75. n = 1.25
but just to show you how strange this question is, let's have a look at the other answer options :
is 5.55 = 3n + 5.4 ?
it would mean
0.15 = 3n
n = 0.05
so, formally, this is also an expression that represents the original expression.
9.15n = 3n + 5.4
6.15n = 5.4
n = 5.4/6.15 = 0.87804878...
so, formally, this is also an expression that represents the original expression.
3.75 + 1.8 = 3n + 5.4
5.55 = 3n + 5.4
and we are back to A and therefore, formally, this is also an expression that represents the original expression.
so, many greetings from me to your teacher. he/she has to be more careful about how to phrase questions.
because here, formally, all 4 answers are theoretically correct.