Step-by-step explanation:

The square root of 100 is 10. This is also a great number because it can be easily squared so you can have an even answer.
If you meant 12 1/4 inches long then your 4 feet and 1 inch long or 49 inches.
An equation between two variables that gives a straight line when plotted on a graph.
2y = x+ x+ 1
2y = 2x + 1
y = (2x+ 1) /2
y = x + 1/2
According to the graph, this equation is linear