Question

Which expression is equivalent to 1.8(2x + 7) - 15?

a 1.2x
b 3.6x - 2.4
0 3.6x - 8
d 16.2x - 15

Answer 1

Option B. 1.8(2x + 7) – 15 = 3.6x – 2.4

Explanation:

1.8(2x + 7) – 15

To know which option is correct, let us simplify the above expression. This can be obtained as follow:

1.8(2x + 7) – 15

Clear bracket

1.8(2x + 7) – 15 = 3.6x + 12.6 – 15

1.8(2x + 7) – 15 = 3.6x – 2.4

Thus,

1.8(2x + 7) – 15 is equivalent to

3.6x – 2.4