Answer: 2.14 %
Step-by-step explanation:
Given : pH measurements of a chemical solutions have
Mean :
Standard deviation :
Let X be the pH reading of a randomly selected customer chemical solution.
We assume pH measurements of this solution have a nearly symmetric/bell-curve distribution (i.e. normal distribution).
The z-score for the normal distribution is given by :-
For x = 6.74
For x = 6.76
The p-value =
In percent,
Hence, the percent of pH measurements reading below 6.74 OR above 6.76 = 2.14%
Answer:
3x^2+24x=-48 -> one solution, x=-4
4x^2-16x=0 -> has two solutions, x=0 and x=4
5x^2+2=4x -> has no solutions,
3(x+5)^2=-2 -> has no solutions.
Step-by-step explanation:
The simplified polynomial after standard form will be;
⇒ - 8x² - 43x - 36
What is an expression?
Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The algebraic expression is;
''The expression (3x + 6)² is subtracted from x² - 7x.''
Now,
We can formulate as;
⇒ (x² - 7x) - (3x + 6)²
⇒ x² - 7x - (9x² + 36x + 36)
⇒ x² - 7x - 9x² - 36x - 36
⇒ - 8x² - 43x - 36
Thus, The simplified polynomial after standard form will be;
⇒ - 8x² - 43x - 36
Learn more about the expression visit:
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Answer:
15 cm²
Step-by-step explanation:
Area of a triangle = * base * height
Base = 10 cm
Height= 3 cm
Area = * 10cm * 3cm
= 5cm * 3cm
= 15cm²