Answer: z=27/4
Step-by-step explanation:
Honestly just use https://www.symbolab.com/solver/equation-calculator
Answer:
x = 14
Step-by-step explanation:
y and x have a proportional relationship. That means that I can multiply them both or divide them both by the same thing and still stay proportional.
when y = 15, x = 6
when y = 5, x = 2 (divided by 3)
when y = 35, x = 14 (multiplied by 7)
Answer:
18
Step-by-step explanation:
Since he ate 3 more and there were none left 3=1/3 so there was 9 when it was half gone so 9*2=18
Hope that helps...
There is not enough evidence to support the administrator’s claim and the true mean is not significantly greater than 280.
<h3>What is a statistical hypothesis?</h3>
A hypothesis to test the given parameters requires that we determine if the mean score of the eighth graders is more than 283, thus:
The null hypothesis:
The alternative hypothesis:
From the population deviation, the Z test for the true mean can be computed as:
Z = 0.756
Note that, since we are carrying out a right-tailed test, the p-value for the test statistics is expressed as follows:
P(z > 0.756)
P = 0.225
Since the P-value is greater than the significance level at α = 0.14, we can conclude that there is not enough evidence to support the administrator’s claim and the true mean is not significantly greater than 280.
Learn more about hypothesis testing here:
brainly.com/question/16251072
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the little check with the dash on top