What is (3/4 x - 1/2 y) + ( - 7/4 x - 5/2 y) in standard form

Step-by-step explanation:

The LCD here is 4.  Rewrite the entire expression using that denominator:

3x - 2y - 7x - 10

            4

Combining like terms, we get:

 -4x - 2y - 10

           4

This can be reduced to  -x - (1/2)y - (10/4).  This has the form Ax + By + C.

Normally, if this were an equation, we'd write Ax + By + C = 0, or, in this particular case,

-x - (1/2)y - (10/4) = 0  or

x + (1/2)y + 10/4 = 0

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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