What is the solution to the equation: 3(-2x - 1) = 2(x + 5)?
1 answer:
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Answer:
The cost of 1 ruler and 1 pencil are $0.35 and $0.25 respectively,
Step-by-step explanation:
Let the cost of 1 ruler be x
Let the cost of 1 pencil be y
Cost of 4 rulers = 4x
Cost of 3 rulers = 3x
Cost of 3 pencils = 3y
Cost of 4 pencils = 4y
We are given that Four rulers and three pencils cost £2.15
4x+3y=2.15 ---- Black line
We are also given that Three rulers and four pencils cost £2.05
3x+4y=2.05 --- Red line
Plot the lines on the graph
Point of Intersection of lines is (0.35,0.25)
Cost of a ruler = $0.35
Cost of a pencil = $0.25
Hence The cost of 1 ruler and 1 pencil are $0.35 and $0.25 respectively,
Answer: well search It up 1/10
Step-by-step explanation:
Answer:
The probability of obtaining a result equivalent to or greater than what was the truly observed value of the test statistic is 0.001.
Step-by-step explanation:
The researcher can use a one sample <em>z</em> test to determine whether his claim is correct or not.
The hypothesis to test whether the mean BMI is more than 25.0, is defined as:
<em>H₀</em>: The mean BMI is not more than 25.0, i.e. <em>μ </em>≤ 25.0.
<em>Hₐ</em>: The mean BMI is more than 25.0, i.e. <em>μ </em>> 25.0.
The test statistic is defined as:
The <em>p</em>-value of the test is,
<em>p</em> = 0.001.
The p-value is well-defined as per the probability, [under the null-hypothesis (<em>H₀</em>)], of attaining a result equivalent to or greater than what was the truly observed value of the test statistic.
A small p-value (typically ≤ 0.05) specifies sufficient proof against the null hypothesis (<em>H₀</em>), so you discard <em>H₀</em>. A large p-value (> 0.05) specifies fragile proof against the <em>H₀</em>, so you fail to discard <em>H₀.</em>
The <em>p</em>-value of 0.001 indicates that the probability of obtaining a result equivalent to or greater than what was the truly observed value of the test statistic is 0.001.
As the <em>p</em>-value is very small, the null hypothesis will be rejected at any level of significance.
Thus, concluding that the mean BMI of adult Canadians is more than 25.0.