Question

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.

3d + $14.00 – $7.00 = $12.10; $1.90


3d – $14.00 + $7.00 = $12.10; $9.55


3d + $14.00 – $7.00 = $12.10; $1.70


2d + $14.00 – $7.00 = $12.10; $2.55

Answer 1

As given

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.

let us assume that the numbers of large drinks are represented by d .

Than the equation becomes

Total money spend = Number of drinks × d + Pizza cost - Gift certificate amount .

Putting all the values in the above

12.10 = 3d + 14.00 - 7.00

Simplify the aboves

12.10 = 3d + 14 - 7

12.10 = 3d + 7

12.10 - 7 = 3d

5.1 = 3d

d = $ 1.7

Therefore the equation to model this situation is 3d + $14.00 – $7.00 = $12.10 and the cost of one large drink is $1.7 .

- Prodixy ☕

Answer 2

3d + $14.00 – $7.00 = $12.10; $1.70

Explanation:

Let the cost of a drink be d.

3 drinks cost 3d. The pizza cost $14.00.

They had a discount of $7.00.

They paid $12.10.

The equation is:

3d + 14.00 - 7.00 = 12.10

3d + 7 = 12.1

3d = 5.1

d = 1.7

A drink costs $1.70.