Which expressions are equivalent to -2.5(1-2n) - 1.5n

-5n - 4

Step-by-step explanation:

The goal is to simplify this expression.

1. Distribute

-2.5 * 1 = -2.5

-2.5 * 2n = -5n

Now, we have

-2.5 - 5n - 1.5

2. Combine like terms

-2.5 + (-1.5) = -4 (+ * - = -   The - cancels out the +)

3. Put it together

-5n - 4

I hope I helped!

Let me know if you need anything else!

~ Zoe

Total marbles: 1+ 4+3 = 8

Picking a blue marble = 4/8 = 1/2

Picking a second one: 1/2 x 1/2 = 1/4 probability