Answer:
X = 4
Step-by-step explanation:
X/2+ 7=9
X/2 = 9-7
X/2 = 2
X = 4
hope it helps!
Answer:
circle
Step-by-step explanation:
A plot of the given points can help you figure this out.
Distance travelled by 1 revolution = circumference of the wheel
and this is diameter * pi = 80pi cms
Distance travelled in 380 revolutions = 380 * 80pi = 95504 cms
Answer= 955 m to nearest meter.
Answer: 4bx^2
Step-by-step explanation:
Answer:
could not be the same
Step-by-step explanation:
Given that approximately US drivers are agewise as follows:
<25 13.2
25-45 37.7%
>45 49.1%
Observations are made for a sample of 200 fatal accidents.
Let us create hypotheses as

(Two tailed chi square test at 5% significance level)
Age <25 25-45 >45
Expected 13.2 37.7 49.1 100
Observed 42 80 78 200
Expected no 26.4 75.4 98.2 200
Chi square 9.218181818 0.280636605 4.155193483 13.65401191
df = 2
p value = 0.001084
Since p <0.05 we reject null hypothesis
At the 0.05 level, the age distribution of drivers involved in fatal accidents within the state could not be the same as the age distribution of all US drivers as there seems to be significant difference.