1. find value of x a.-3 b.13.9 c.20 d.11 2. find value of x a.17.33 b.26 c.22 d.14

1. C.20

2. C.22

Step-by-step explanation:

For the first question you would set up the equation 3x+7+5x+13=180. You would combine like terms, getting 8x+20=180, subtract 20 from both sides, getting 8x=160, then divide both sides, getting x as 20. For the second question you would set up the equation 5x+5x-40=180. You would combine like terms, getting 10x-40=180, add 40 to both sides, getting 10x=220, then divide both sides by 10, getting x as 22.

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

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