If AB = 6 and A+B = 5 then the value of (A square + B square) is what? Can't copy from Google otherwise I will delete your answer also if you Write that you don't know or that you don't understand.

plus or minus 5

Step-by-step explanation:

a + b = 5. b = 6/a; therefore a + 6/a = 5; therefore a² - 5a + 6 = 0

So we have a quadratic equation, and don’t even need the formula because it factorizes easily:

(a - 2) (a - 3) = 0. So a = 2 or 3, so b = 3 or 2.

So a² - b² = 2² - 3² = -5, or 3² - 2² = +5. ANSWER: plus or minus 5.

y = x + 95

y = 42 + 95

y=137 mm hg

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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