For #1-2, model each expression. Then simplify the expression. Expression Model Simplified 1. 3(2x + 1) 2. 2(3x – 2) In #3-4, simplify the expression. Models are optional. 3. 4(x + 1) 4. –2(x + 3)

see below

Step-by-step explanation:

1.  3(2x + 1)

Distribute

3 * 2x +3*1

6x+3

2. 2(3x – 2)

Distribute

2 * 3x - 2 *2

6x -4

3.  4(x + 1)

Distribute

4*x +4*1

4x+4

4.  –2(x + 3)

Distribute

-2*x -2*3

-2x-6

the answer i believe is 27 units.

step-by-step explanation:

it is 28 degrees colder in detroit than philadelphia.

step-by-step explanation:

what number adds to 21

-7 + ? = 21

-7 + 28 = 21

hope it