HW 3: Writing Linear Equations

Mr. Bates doesn't have Amazon Prime. He wants to buy DVDs for his parents that cost cost $3 each. There is a $7 shipping fee for the entire order. Write an equation to model this situation.

• y = 3x+7

• y = 7x+3

• y = -3x+9

• y = 4x+9

Dominoes charges $6 per pizza. The delivery fee is $4. Write an equation to model this situation.

• y = -4x+6

• y = 6x+4

• y = 1/6x-4

• y = 64x

Walmart charges $4 per pack of Post-It notes. Write an equation to model this situation.

• y = 6x

• y = 4x+15

• y = 20x

• y = 4x

Staples charges $4 per pack of pens. They also charge a $7 shipping fee. Write an equation to model this situation.

• y = 4x+7

• y = 4x-7

• y = 7x-4

• y = 28x

Jimmy John's charges $7 per sub. They also charge a $3 delivery fee. Write an equation to model this situation.

• y = -3x+7

• y = 37x

• y = 7x+3

• y = 3x-7

Pizza King charges $10 per pizza. They also charge a $4 delivery fee. Write an equation to model this situation.

• y = 10x+4

• y= 10x-4

• y = 4x-10

• y = 10x

Your parents give you $10 to start saving to your piggy bank. Each week you add $4 to your piggy bank. Write an equation to model this situation.

• y = 10x-4

• y = 4x+10

• y = -10x-4

• y = 10x

At American Eagle, it costs $15 for each t-shirt you buy. Write an equation to model this situation.

• y = 15x+20

• y = 20x

• y = 15x

• y = 15x-20

Fortnite is free to download. You can buy skins for $2 to enhance your experience. Write an equation to model this situation.

• y = 2x

• y = 2x+60

• y = 60x

• y = 4x

You earn $10 every hour at work. It costs you $2 in gas. Write an equation to model this situation.

• y = 10x-2

• y = 2x-10

• y = 2x+10

• y = 10x+2