Mary ordered lunch for herself and several co-workers on monday and tuesday. on
monday, she paid $7 for 5 sandwiches and 4'sodas. on tuesday, 'she paid $6 for 4 of
each. find the price of a sandwich and the price of a soda.

the sandwiches are 1 dollar and soda for 50 cents

Step-by-step explanation:

Thus, the price of each sandwich is $1 and each soda $0.50.

Step-by-step explanation:

Let:

x: price of sandwiches

y: price of sodas

Now, write the equations for the amount that Mary paid on Monday and Tuesday for sandwiches & sodas:

Monday:

Tuesday:

When adding Tuesday equation from Monday equation, we found that x = 1. This value can be substituted into one of the equations. By substituting into Monday equation:

Now, let's solve the equation with one variable:

= 2 " alt="\frac{4x}{4} = \frac{2}{4}" /> = 2 " />

Thus, the price of each sandwich is $1 and each soda $0.50.

answer:

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

explanation:

service only with 20% tip  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

in the opening of the question the word 'service' is associated only with the pretax value.

the closing part of the question asks: how much did she pay for the  

service

−−−−−−  

so technically the answer is  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

however, the intention of the question provider may have been that your answer is to be  

$

87.12

(

1

+

8

100

)

=

$

94.09

to 2 decimal places.

'

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

tony b

mar 21, 2017

answer:

trying to explain it another way

explanation:

service charge  

.

→

$

72.60

20% tip  

20

100

×

$

72.60

=

$

14.52

−−−−−−  

←

add

$

87.12

tax  

8

100

×

$

87.12

=

$

6.97

−−−−−  

←

add

$

94.09

related questions

c

step-by-step explanation:

it would be see because your formula is f(x)=6x, so 6 times 1 is 6 and you go on and the best answer is c.