Question

which expression is equivalent to 1.2y + 4.5 - 3.4y - 6.3?

a. -2.2y - 1.8

b. 4.6y - 1.8

c. 5.5y - 10.2

d. 2.2y + 11.1

Answer 1

To simplify the expression \(1.2y + 4.5 - 3.4y - 6.3\), we will combine like terms.

1. Combine the \(y\) terms:
\[
1.2y - 3.4y = -2.2y
\]

2. Combine the constant terms:
\[
4.5 - 6.3 = -1.8
\]

Putting these together, we get:
\[
-2.2y - 1.8
\]

Thus, the expression equivalent to \(1.2y + 4.5 - 3.4y - 6.3\) is:
\[
\boxed{-2.2y - 1.8}
\]

So the correct answer is:
**a. -2.2y - 1.8**.