The answer is 13 because 74-9= 65. 65/5 = 13
<span>there are 100 centimeters in a meter.
therefore 2.5 meters = 2.5 * 100 = 250 centimeters.
x = the length of the first board.
2x + 18 = the length of the second board.
x - 12 = the length of the third board.
x + 4 = the length of the fourth board.
the total length of all the boards is equal to 5x + 10,
since the total length of the board is 250 centimeters, then you get:
5x + 10 = 250
</span><span>solve for x to get x = 48 centimeters.
the 4 board lengths are:
x = 48
2x + 18 = 114
x - 12 = 36
x + 4 = 52
add them up and you get a total of 250 centimeters.
250 centimeters / 100 = 2.5 meters.
this confirms the solution is good.
</span>
The factorized form of the given equation is ~
Let's solve ~
Now, as we can see, an Identity is applied here ~
that is ;
So, let's use this identity in our next step, taking :
C. I think I’m not totally sure but I think that’s right
I wish I knew :( but sadly i havent even learn that yet :(
