The answer is A, I figured this out by process of elimination.
Adelle steps:




Answer:
See Explanation Below
Step-by-step explanation:
Given

Required
Justify each step
Step 1:

This is the question in its original form
Step 2:

Here she performed addition property of an equation by adding 6 to both sides of step 1.
This is shown below


Step 3:

Here she performed multiplication property of an equation by multiplying both sides of step 2 by 7
This is shown below


Step 4:

Here she also performed multiplication property of an equation by multiplying both sides of step 3 by ¼
This is shown below


We write f(x) in terms of y I.e y=7x-1/2.
Fractions are sometimes ambiguous, we eliminate the fraction by multiplaying the entire function by 2.so as to get 2y=14x-1.
Make x the subject, x=2y+1/14,
Thus the inverse f(x)=2x+1/14
Answer:
-11
Step-by-step explanation:
assuming 4x-3 = f(x) and the other equation = g(x)
(4x-3) - (x^2 +2x)
(4(4)-3) - (4^2 +2(4)
(16-3)-(16+8)
(13)-(24)
-11
Answer:
2√3
Step-by-step explanation:
5y2+20=80
Step 1: Subtract 20 from both sides.
5y^2+20−20=80−20
5y^2=60
Step 2: Divide both sides by 5.
5y^2
/5 =
60/5
y2=12
Step 3: Take square root.
y=√12
y=2√3