A number line. like where u plot the points (usually numbers) to compare them.
Answer:

Step-by-step explanation:
In Step # 3, We need to divide rather than to subtract. So, the first mistake is done in step 3.
Answer:
if it says 12x = 7
the u will divide the 12 on both sides and x will equal to 7/12,,
if it simply says 12 = 7 then put false cause that's not true!!
I don't really understand why there is a one, but I can tell you that "29" is prime and "27" is not.
Answer:
Area = L^2 + 5L units^2
Step-by-step explanation:
Length = L
Width = L + 5 Because it is 4 longer than the length.
Area = W * L
Area = L * (L + 5)
Area = L^2 + 5L units^2
You can test it by substituting number in:
If the length is 4 and the width is 9 (4 + 5)
4 * 9 = 36 units^2
4^2 + 5 * 4 = 16 + 20 = 36 units^2