Answer:
Step-by-step explanation:
Convert it to an expression:
You plug 7 in for x
Therefore, f(7)=7-2=5
So f(7)=5
Answer:
y = 4x - 8
Step-by-step explanation:
x = 1/4y + 2
-1/4y -1/4y
-1/4y + x = 2
-x -x
-1/4y= -x + 2
*-4 *-4
y = 4x - 8
Answer:1380
Step-by-step explanation: 12x115
Each side is x units long. There are 6 sides. So we add up all the sides to get the perimeter.
x+x+x + x+x+x
there are six copies of x being added
Simplifying that expression above leads to 6*x or simply 6x. Multiplication is a shortcut for repeated addition. Instead of saying 2+2+2+2, we can write 4*2
Answer: Choice C) 6x
