I really don't get any of these questions.. #1-7

I would give you the answers but then that wouldn't help you, so sorry in advance.

We already know that the slope of a line is rise over run

or y1-y2/x1-x2

But that only gives us the slope

What if we want to have an equation that shows what points it passes through as well

Well, that's basically what slope-intercept is.

We can use this simple formula (simple because there's much more complicated formulas)

y=mx+b where y equals the y coordinate, x equals the x coordinate, m equals the slope, and b is the y-intercept.

As an example, I'll do the first one for you.

y=mx+b

Plug in what we know

y=1x+4

You can simplify this down to

y=x+4, since 1 is identity property.

Then, you make up what x is, and your like "x is 0", if x=0, then y=4, so it'll work like that, but I'm pretty sure you don't have to show that.

And as a treat, I'll do the second one as an example:

y=mx+b

Plug in what we know

y=2x+(-2)

Simplify

y=2x-2

Same thing here, you make up what x is, and your like "x is 0", if x=0, then y=4, so it'll work like that, but I'm pretty sure you don't have to show that.

Hope this helps, let me know if you have any questions,

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

a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

happy to

pls mark as brainliest.