Twice the difference of a number and six equal seven

2 *(n-6) = 7

n = 19/2 or 9 1/2

Step-by-step explanation:

Twice the difference of a number and six equal seven

2 *(n-6) = 7

distribute

2n-2*6 =7

2n -12 =7

add 12 to each side

2n = 19

divide by 2

n = 19/2

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: