SOLVING ABSOLUTE VALUE EQUATION
1 answer:
Answer:
1. x=27
2. x=11 or x=-7
3. x=4
4. x=1 or
5. x=12
6. x=11 or x=-1
7. x=8
8. x=3 or x=1
9. or x=-4
10.x=7 or x=1
Step-by-step explanation:
For the first 8, the absolute value portion is just substituted in for x, so we can skip some of the repeated work that would occur in these. For the absolute value problems, there are two solutions each. When you remove an absolute value, you have to add a plus or minus to each side and solve for each.
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Answer:
Yes, there enough evidence to reject the claim.
Step-by-step explanation:
Here we need to perform a test for single mean to determine whether the mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is $13,960.
The hypothesis is:
<em>H₀</em>: The mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is $13,960, i.e. µ = $13,960.
<em>Hₐ</em>: The mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is different from $13,960, i.e. µ ≠ $13,960.
The information provided is:
The test statistic is:
The test statistic value is -2.24.
Compute the <em>p</em>-value for this test statistic value at 10% level of significance as follows:
Use the <em>z</em>-table.
The calculated <em>p</em>-value is, 0.0251 < 0.10, therefore the null hypothesis will be rejected.
<u>Conclusion</u>:
As the null hypothesis is rejected at 10% level of significance it can be concluded that there enough evidence to reject the claim.
The mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is different from $13,960.