If Angle AOC =85 and angle BOC=2x+10 and angleAOB=4x-15 find the degress measure of BOC and AOB
1 answer:
Answer:
m angle BOC 120
m angle AOB 205
Step-by-step explanation:
So you are given mangle AOC+mangle BOC=mangle AOB.
mangle means measure of angle.
Let's do some substituting into our equation.
85+2x+10=4x-15
Solve for x... First I'm going to combine the like terms on the left hand side:
95+2x=4x-15
Add 15 on both sides
110+2x=4x
Subtract 2x on both sides
110 =2x
Divide both sides by 2
110/2 =x
x =110/2
x =55
So Recall mangle BOC=2x+10 =2(55)+10=110+10=120
And you also have mangle AOB=4x-15=4(55)-15=220-15=205
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Answer:
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Step-by-step explanation:
Let and
be sample means of white and Jesse denotes are two random variables.
Given that both samples are having normally distributed.
Assume having with mean
and
having mean
Also we have given the variance is constant
A)
We can test hypothesis as
For this problem
Test statistic is
Where
We have given all information for samples
By calculations we get
s=2.41
T=2.52
Here test statistic is having t-distribution with df=(10+7-2)=15
So p-value is P(t15>2.52)=0.012
Here significance level is 0.05
Since p-value is <0.05 we are rejecting null hypothesis at 95% confidence.
We can conclude that White has significant higher mean than Jesse. This claim we can made at 95% confidence.