An expression is shown. 2.1 x 105 + 4.3 x 104
Which expression is equivalent?
A 2.53 x 104
B 2.53 x 105
© 6.4 x 105
D 6.4 x 10°

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field