4/5 to get a rational number bc it would be 5. hope it helps.
A way of undoing any operation, is using the inverse of the operation. So if you want to ‘undo’ addition you subtract, and if you want to ‘undo’ multiplication you divide.
Hope this helps!!
N - the number
14 + n = 17 |subtract 14 from both sides
n = 3
Since the height is different on both ends, we can assume that the wall is a trapezoid. Knowing that, we can replace the measures we know in the formula and our onky variable is the length of the wall - we only need to isolate it.
A= ((b+B)h)/2
26.4=((2+2.4)h)/2
52.8=4.4h
h=12
200/5=40
He can buy 40 pens!!
Hope this helps!!
