Parabola is defined by the equation x2 = y. in which direction will the parabola open? a. up b. down c. right d. left e. cannot be determined

Option A: Up

Step-by-step explanation:

When we have a quadratic equation of the form:

y = ax^2 + bx + c  

The sign of "a" defines how the equation "opens"

This is because a is multiplicating the term that grows faster as x changes (the biggest power in the polynomial, x^2)

So if a is positive, as IxI grows, the value of y(x) will be also positive.

if a is negative, as IxI grows the value of y(x) will also be negative.

So here we have the equation y = x^2

here we have a = 1, b = 0 and c = 0.

Here "a" is positive, this means that the parabola will open up, so the correct option is A.

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

ok

step-by-step explanation: