Answer:
1.7030973451327434
Step-by-step explanation:
The slope of the first line is

.
To be perpendicular the slope of the second line must be the negative reciprocal of the first:

Use the slope-intercept formula:

Substitute known values:

Solve for

:

Complete the formula:
The answer would be C
2x + 9 = 21
1. 2x = 12
2. x = 6
Answer:
1/4
Step-by-step explanation:
The sides go from 4 units to 1 unit so the dilation must be 1/4