5 ( x + 3) = 6x - 3
5x + 15 = 6x - 3
x = 18 <====== this is the number
To find the margin of error, multiply the z-score by the standard deviation, then divide by the square root of the sample size.The z*-score for a 90% confidence level is 1.645.The margin of error is 0.20.The confidence interval is 48.3 to 48.7.48.8 is not within the confidence interval.
The maximum height and horizontal distance is required.
Maximum height 8 feet; horizontal distance 16 feet
The given path is 
If the skateboarder jumps at x = 0 she will land at y = 0. However there will be at horizontal displacement.

or

The distance between -5 and 11 is 
Middle point would be
from
.

So, 
The maximum height will be

The maximum height is 8 feet and the horizontal distance is 16 feet.
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Answer:
D is the right answer right
Step-by-step explanation:
D