So, why is the base not included in the equation? 24 * 4 sides but it doesn't include the base. Does the sides account for the base? I just want a explanation.

Step-by-step explanation:

I'm not certain I understand your question.

Let's start at the beginning. What you are supposed to do is find the area of the 4 triangles.

QRP is one of the tringles.  It has a height of RS which is 6 cm. The base of the triangle comes from the square on the bottom of the diagram (and yes it is an optical illusion).

The square has a side length of 8 cm.

Area QRP = 1/2 * base * height

base = 8 cm

height = 6 cm

Area QRP = 1/2 * 8 *6 = 24   Oh that's where you got 24 * 4

There are 4 triangles that are the same as QRP so the answer is 24*4

The base of the triangle is included. It is just a bit disguised. It comes from the 24. Excellent question.

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

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0