Directions: Simplify each expression by combining like terms
1.) -y+9z-16y-25z
2.) 6x +3y-y+2+2
3.) 9b + 5(b - 4) + 15

4.) -4(3x + 5) + 10x + 1
5.) 0.5(y + 4) + 18y - 9
6.) -0.7r+9(-r-15)

Answers:

1.) -y+9z-16y-25z  =   -17y-16z

2.) 6x +3y-y+2+2  =   6x+2y+4

3.) 9b + 5(b - 4) + 15  =   14b-5

4.) -4(3x + 5) + 10x + 1  =   -2x-19

5.) 0.5(y + 4) + 18y - 9  =   18.5y-7

6.) -0.7r+9(-r-15)  =    -9.7r-135

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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: