Find the values of a and b

a = 14°

b = 36°

Step-by-step explanation:

4b - 12 + 48 = 180 (supplementary)

Rearrange

4b = 180 - 48 + 12

4b = 144

b = 36°

4a - 8 + 4b - 12 = 180 (supplementary)

sub b = 36 into equation

4a - 8 + 144 - 12 = 180

Rearrange

4a = 180 - 144 + 12 + 8

4a = 56

a = 14°

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

answer: im gonna go with milli

step-by-step explanation: