The average age of Stokes County school board members over the last 40 years has been 51, but members have ranged from 30 to 73. Use the range rule
of thumb to estimate the standard deviation of the members' ages.

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

.19875994384

step-by-step explanation:

1699/ 8548

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation:

step-by-step explanation: