Hello :
the discriminat of each quadratic equation : ax²+bx+c=0 ....(a <span>≠ 0) is :
</span><span>Δ = b² -4ac
1 ) </span>Δ > 0 the equation has two reals solutions : x = (-b±√Δ)/2a
2 ) Δ = 0 : one solution : x = -b/2a
3 ) Δ <span>< 0 : no reals solutions
in this exercice : </span><span>2x ² - 3x - 1 = 0....a =2 b =-3 c =-1
calculate : </span>Δ ......................................
Answer:
The dependent variable depends on the independent variable.
Step-by-step explanation:
- The variable whose values are deliberately changed by the researcher in order to obtain the desired outcome is called independent variable...
- The values of the independent variable can be changed as per requirement, by the researcher...
- Manipulation can be done in the values of independent variable, but the researcher observes the value of a dependent variable during an experiment.
- An independent variable is a presumed cause whereas dependent variable is a measured effect.
- In a simple linear regression, ‘y’ denotes dependent variable while ‘x’ denotes independent variable, which means y depends on x
Answer:
<h3>A cube</h3>
Step-by-step explanation:
Vertices of a solid shape is a point where 2 lines or edges of the shape intersects. If tom has a cube a rectangular prism and a triangular prism, then the cube has 8 vertices, a rectangular prism has 5 vertices (a rectangle has 4 vertices plus the point where all the lines coming from the vertices of the rectangle intersects).
Also, a triangular prism has 4 vertices(a triangle has 3 vertices plus the point where all the lines coming from the vertices of the triangle intersects)
Hence the only shape that has more than 6 vertices is a cube.
