A quadratic equation has to have x^2....it does not necessarily have to have a constant.
7x^2 + 14x = 0
x^2 + 3x - 5 = 0
x^2 - x = 3x + 7
these are quadratic
Answer:
Step-by-step explanation:
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Hope this helps!
Using the normal distribution, it is found that 44.43% of students are 21 or older and thus old enough to legally order alcohol at Griff's.
<h3>Normal Probability Distribution</h3>
The z-score of a measure X of a normally distributed variable with mean and standard deviation is given by:
- The z-score measures how many standard deviations the measure is above or below the mean.
- Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
The mean and the standard deviation are given, respectively, by:
The proportion of students that are 21 or older is <u>one subtracted by the p-value of Z when X = 21</u>, hence:
Z = 0.14
Z = 0.14 has a p-value of 0.5557.
1 - 0.5557 = 0.4443 = 44.43% of students are 21 or older and thus old enough to legally order alcohol at Griff's.
More can be learned about the normal distribution at brainly.com/question/4079902
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Answer:
C 8/3
Step-by-step explanation:
<em>g(x)=3x-1=7</em>
<em><=> 3x=7+1</em>
<em><=> 3x=8</em>
<em><=> x=8/3</em>
Multiply bottom equation by -3 to add and eliminate y’s.
So...
5x-15y=10
+-9x+15y=18
You get -4x=28 so x=-7
Plug in to get y
5(-7)-15y=10
-35-15y=10
-15y=45
So y=-3
Check in other equation
3(-7)-5(-3)=
-21+15=-6
So x= -7 and y= -3