Mathematical Expressions

What is the simplified form of this expression
3x+4+5x+3

• 15x
• 8x+7
• 7x+8

Add these expressions
(3x+15) + (4x+13)

• 7x+ 28
• 35x
• x+2

6z + 3 -4z = 9

• z = 3
• z = 60
• z = 30
• z = 1

Maria has 25 dollars.  She has to buy a gallon of milk which costs $3.50.  She wants to spend the rest of her money on cereal.  If each box of cereal costs $4.50, how many can she purchase?

• 4 boxes
• 5 boxes
• 6 boxes
• 7 boxes

Solve 
  -5t + 9 = 24

• t = -3
• t = 3
• t = 6
• t = 12

Solve  12 - 6y = 24

• 2
• -2
• 3
• -3

3x + 2(4x - 4) = 3

• x = 22
• x = -22
• x = 1
• x = -1

3x + 10(1 – 7x)

• 13x – 7
• –67x + 10
• –4x + 10
• –73x + 10

–2n + 5(–3 + 3n)

• –15 + n
• 17n – 15
• 13n – 15
• –17n + 3

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4