Answer:
D) We are 95 percent confident that the mean difference in scores for all children in the program is between 20.1 points and 23.9 points.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
95 percent confidence interval (20.1,23.9)
We are 95% sure that the population mean(that is, the mean for all children in the program) is in this interval. So the correct answer is given by option D.
Y = 4x + 9
x-coordinate = -2.35
y = -1.8x
x-coordinate = 0
Answer:
B) x=80°
Step-by-step explanation:
This is a hexagon, so it has interior angles equaling 720°. (N-2)*180
So the equation would be
78+134+136+132+2x+x=720
480+3x=720
3x=720-480
3x=240
x=80°
Hi there!
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I believe your answer is:
14
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Here’s why:
- I have graphed the given solution in a program. The parabola intercepts at (4,0) and (14,0).
- The x-intercepts of a parabola are the solutions to the equation. The other solution should be 14.
⸻⸻⸻⸻
See graph below.
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Hope this helps you. I apologize if it’s incorrect.
9514 1404 393
Answer:
8
Step-by-step explanation:
A system of linear equations has no solution when the equations describe parallel lines. Parallel lines have the same slope. In your equation, the slope is the x-coefficient, 8. A parallel line will have a slope of 8.
The second equation will have a slope of 8 if the system has no solution.