Question

Which of the following best describes the algebraic expression 7(x +12) - 4 ?

O
A. Four less than seven times a number plus twelve.
B. Seven times a number plus twelve minus four.
C. Four less than seven times the quantity of a number plus twelve.
D. Seven times the quantity of a number plus twelve less than four.

Answer 1

C. Four less than seven times the quantity of a number plus twelve.

Explanation:

Given the algebraic equation:

7(x +12) - 4

we have:

• first term: 7(x +12), which is composed by 7 and (x + 12)

• second term: - 4

The second part of the first term is described by "a number plus twelve". This has to be multiplied by 7, to made the first term.

If we want to find a number which is 4 less than 5, we made 5 - 4 = 1. Then, if we want an an expression which is 4 less than the first term, we made: first term - 4

Answer 2

C. Four less than seven times quantity of a number plus twelve.

Explanation:

We can see from the given expression that 4 is subtracted from 7(x+12). The term used to describe subtraction is less. So, it is 4 less than 7(x+12).

We can clearly see that the first term is x and x can take any value.

So the whole expression will be four less than seven times quantity of a number plus twelve.

Hence option C is the correct answer ..