Plug in 4 for the value of x.
f(4)= 1/2(4)-2
f(4)= 2-2
f(4)= 0
Final answer: 0
Answer: The answer is (D) 
Step-by-step explanation: Given that there is a rectangle, where length of the rectangle is given by

and width of the rectangle is given by

We are to find the perimeter of the rectangle. To do so, we need to add two times length with two times breadth of the rectangle.
Therefore, perimeter is given by

Thus, the correct option is (D).
Answer:
y=2x+4 so C
Step-by-step explanation:
Well, I will not just give you a straight answer, since I do not have the resources to currently do so. But as a tip, I would try the substitution method to get rid of the ‘x’ variable and just solve for ‘c’ like normal. Your main expression should look like this, I believe:
21.2x+c = 5.3(4x-2.6)
To substitute h the is out, you could write this if it feels better for you:
21x+c = y and 5.3(4x-2.6) = y
Hope this helps!
Answer: y = 1/2x + 1
Step-by-step explanation: