The answer is option A.
This is because...
In A you create a list of all the possibilities of length and width that would equal an area of 100 square feet.
In B it says you need to guess and check which 2 number multiply together to make 100.
In C you have to use objects and arramge 100 square tiles in different patterns till you get a rectangular shape.
The answer= option A
I hope it helped.
Answer: 1.25 or 5/4
Steps:
Move the -3x to the other side by adding it which gives you 4x=5. Then divide by 4 to have the x alone which gives you the answer. Hopes this helps :)
160 i believe. to find the area of a triangle act like its a square and divide in half. for squares multiply base by height.
take the area of each shape and add it up
I'll round off the first equation to 3 decimal points
1 -

2 - 70.391 units
3 - 7.582 sec