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weqwewe [10]
3 years ago
6

Determine whether the data described below are qualitative or quantitative and explain why.

Mathematics
1 answer:
Fudgin [204]3 years ago
4 0

Answer:

The data are qualitative because they don't measure or count anything.

Step-by-step explanation:

Qualitative  data are data that are collected or obtained from variables or items of information that have no notion of numerical magnitude. They are essentially categorical and can only be measured on the nominal or ordinal scale. Because each category is associated with an attribute of the variable, it is also called attributive data. When the variable or item of information has only two possible categories, it is called Binary Data. An example of this is sex which can be categorized as (male and female)

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Use the discriminant, b2 - 4ac, to determine which equation has complex solutions.
ruslelena [56]

Using the discriminant, the quadratic equation that has complex solutions is given by:

x² + 2x + 5 = 0.

<h3>What is the discriminant of a quadratic equation and how does it influence the solutions?</h3>

A quadratic equation is modeled by:

y = ax² + bx + c

The discriminant is:

\Delta = b^2 - 4ac

The solutions are as follows:

  • If \mathbf{\Delta > 0}, it has 2 real solutions.
  • If \mathbf{\Delta = 0}, it has 1 real solutions.
  • If \mathbf{\Delta < 0}, it has 2 complex solutions.

In this problem, we want a negative discriminant, hence the equation is:

x² + 2x + 5 = 0.

As the coefficients are a = 1, b = 2, c = 5, hence:

\Delta = 2^2 - 4(1)(5) = 4 - 20 = -16

More can be learned about the discriminant of quadratic functions at brainly.com/question/19776811

#SPJ1

3 0
2 years ago
Three times a number decreased by 9
DedPeter [7]

Answer:

I do not know what you want, but the equation is 3x - 9

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
Evaluate 2d+3 when d = 8
IgorC [24]
2d+3
2(8)+3
Multiply 2 and 8
16+3
19
So the answer is 19
5 0
4 years ago
Read 2 more answers
Graph the systems of equations.<br><br> {2x+y=8−x+2y=6
victus00 [196]
Hi, I actually just took the test and got 100%

Remember: When plotting the points for this equation, make sure to always first plot the ones that correspond to the first linear equation, and then plot the ones that correspond to the second linear equation. 

The points on the line should be for the first linear equation, (4,0) and (8,0). I got this answer by first converting the linear equation, 2x+y=8 from standard form to slope-intercept form. To do this, I subtracted 2x from both sides of the equation. So now it reads as y=8-2x. After this step was completed, I then graphed my first linear equation.
The points on the line should be for the first linear equation, (2,4) and (6,6). 
I got this answer by first converting the linear equation, -x+2y=6 into slope-intercept form. To do this, I subtracted -x from both sides of the equation. Then I had to divide the 2 into both -x and 6. So now it reads as y= 6/2-x/2. After this step was completed, I then graphed my second and final linear equation.


I hope this helps!
5 0
3 years ago
Read 2 more answers
Evaluate. -3 -4 4 undefined
aev [14]

The algebra question should look like this: <u><em>3^√-64</em></u>.  

The answer is -4.

8 0
4 years ago
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