John and 2 friends are going out for pizza for lunch. They split one pizza and 3 large drinks. The pizza cost $14.00. After using a $7.00 gift certificate, they spend a total of $12.10. Write an equation to model this situation, and find the cost of one large drink. A.3d + $14.00 – $7.00 = $12.10; $1.90

B.3d – $14.00 + $7.00 = $12.10; $9.55

C.3d + $14.00 – $7.00 = $12.10; $1.70

D.2d + $14.00 – $7.00 = $12.10; $2.55

3 people get 3 drinks which is written as 3d, add the cost of the pizza and subtract the gift certificate to get the total they spent:

3d + 14.00 - 7.00 = 12.10

Now solve for the cost of a drink:

Simplify the equation:

3d + 7.00 = 12.10

Subtract 7 from both sides

3d = 5.10

Divide both sides by 3:

D = 1.70

The answer is :

C.3d + $14.00 – $7.00 = $12.10; $1.70

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