4x=x-1+19 -> 4x=x+18 (then you minus 1x from both sides) -> 3x=18; x=6
Answer:
1. B
2.C
Step-by-step explanation:
A plot of land in the shape of a vertical ellipse. The equation of the ellipse is

If the foci are 8 feet from the center, then 
If the plot of land is 34 feet across the vertical axis, then 
Use formula
(because ellipse is vertical, then b>a) to find a:

Then the plot of land is 2a=30 ft across the other axis.
If b>a, the eccentricity of the ellipse is

Answer:
c four tenths
Step-by-step explanation:
tenths are the first space after the decimal.