Simplify:

1) 5(y + 1) + 5(y – 1)

2) 4z – 7(3z – 4)

3) 6(6k + 7) – 7k

4) 2(4p – 3) + (p + 7)

5) 6s – (3s – 2)

6) -4(w + 1) + 5w

7) -10(t – 8) – 7t

8) 3(3t – 2) – 2(t + 1)

9) -(n + 2) + 3(n – 2)

1)10y

2)-17z+28

3)29k+42

4)9p-3

5)3s+2

6)w-4

7)-17t+80

8)7t-8

9)2n-8

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.