The new equation after the expression equivalent to x from the first equation is substituted into the second equation is: 
Step-by-step explanation:
We will solve the initial steps for substitution method for finding the correct answer
Given equations are:

From equation one

Putting x = -4y-9 in equation 2

Hence,
The new equation after the expression equivalent to x from the first equation is substituted into the second equation is: 
Keywords: Linear equations, variables
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Answer:
18.4
Step-by-step explanation:
Answer:
30
Step-by-step explanation:
just becausr
B) 52.5°
Bisect means in half and half of 105° is 52.5°