Answer:

Step-by-step explanation:
y = 3 - xy
Let x = 1
y = 3 - (1)y
Expand brackets.
y = 3 - y
Add y to both sides.
2y = 3
Divide both sides by 2.
y = 3/2
Answer:
17
Step-by-step explanation:
x = -4 is not undefined because f(x) = x+4 is in the top part, the numerator, not the denominator. So the value that makes f(x) = x + 4 zero does not result in a division by zero.
Indeed, if we try to evaluate (f/g)(-4), then we get

which does not involve a division by zero.
However, attempting to evaluate (f/g)(3) leads us to

which involves a division by zero, and divisions by zero are undefined
The area of the trapezoid is 77 inches^2