1. add: (8x - 2y) + (4x + 4y - 6)

2. subtract: (2p² + q) - (p² + q)

3. subtract and simplify: (y² - 3y - 5) - (-y² - 7y + 4)

4. add: (11a + 4b) + (a + 4b - 2)

The first one is 2(6x-y-3)

Step-by-step explanation:

You have to factor the expression then remove parenthesis then factor the rest then collect like terms.

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: