Answer:
-56
Explanation:
From the equation:
0.75(x + 20) = 2 + 0.5(x - 2)
Open brackets
0.75x + 15 = 2 + 0.5x - 1
Collect like terms
0.75x - 0.5x = 2 - 1 - 15
0.25x = - 14
Divide both sides by 0.25
x = -56
The statement that Phenolphthalein is not
affected by PH is False
Phenolphthalein is a colorless
chemical compound, when added to alkaline
solutions it will turns pink, which means it
has been affected by the PH.
Phenolphthalein will remain colorless
if in acidic solution, that's less than PH of 7.
But at pH level of 8.2 it turns pink then at pH
10 it turns magenta.
Therefore, PH do affect Phenolphthalein
indicator
Answer:
give us hint so i can help u
Explanation:
:)
Using it's concept, it is found that the sample mean of cars sold per week is of 4.96.
<h3>What is the mean?</h3>
The mean of a data-set is given by the <u>sum of all observations in the data-set divided by the number of observations</u>.
In this problem, the sum of the 26 observations is given by:
S = 1 + 1 + 4 + 2 + 4 + 10 + 8 + 5 + 9 + 6 + 1 + 5 + 6 + 5 + 7 + 1 + 4 + 6 + 8 + 9 + 2 + 5 + 9 + 5 + 3 + 3 = 129.
Hence the mean is given by:
M = 129/26 = 4.96.
More can be learned about the mean concept at brainly.com/question/25122507
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