LAST question !! need help with number 9 but if u can help me with #8 ur an angel

8) interior angle = 160

9) x = 20

Step-by-step explanation:

8)

18-gon has 18 sides

The formula for sum of interior angles for an 18-gon is:

(18x180)-360 = 2880 degrees

2880 degrees / 18 angles = 160 degrees

9)  

exterior angles = 360 degrees

360 = (3x-2)+(x+8)+(4x+9)+(2x-1)+(3x)+(4x+6)

360 = 3x-2+x+8+4x+9+2x-1+3x+4x+6

360 = 17x+20

17x = 340

x = 20 degrees

3-4

step-by-step explanation:

the answer is 3-4 because both 45 and 60 has a multiple of 15.

45/3=15

60/4=15

therefore the odds against selecting a red is 4-3

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."