Hi.
To formally answer your question:
D. y = 0.75<em>x</em> + 11
We can prove this by substituting <em>x</em> with 1 (the initial measurement)
y = 0.75(1) + 11 = 11.75
~

No real solutions, because for all real numbers the square of number is greater or equal 0.
Answer:
x=1
Step-by-step explanation:
Subtract
18
from both sides
Simplify
3
Subtract
2x
from both sides
use the substitution method
b+7
19+7
Answer: 26