Question

You and a group of 7 friends go out for pizza. One large pizza and 2 large drinks cost ​$19.97. One large pizza and 4 large drinks cost ​$27.95. Write a linear function rule that models the total cost y​ (in dollars) for one large pizza and any number of drinks x.

Use the linear function rule to estimate the cost of one large pizza and 8 drinks for you and your friends.


The linear function rule is y = ?

Answer 1

Explanation:

"1 pizza and 2 drinks cost ​$19.97"

p + 2d = 19.97

"1 pizza and 4 drinks cost ​$27.95"

p + 4d = 27.95

2d = 27.95-19.97 = 7.98

d = 3.99

p = 19.97 - 2d = 11.99

"cost y​ (in dollars) for 1 pizza and any number of drinks x."

y = 11.99 + 3.99x

Answer 2

hey

Explanation:

Let x = the cost of one large pizza

Let y = the cost of one small drink

3x + y = 21.96

-(6x + y = 27.93)

-3x = -5.97

x = $1.99

3(1.99) + y = 21.96

5.97 + y = 21.96

y = $15.99

So, 1 large pizza and 8 small drinks would cost 15.99 + 8(1.99) = $31.91

-God