The perimeter of a rectangle is 245 feet. The short sides are each 30 feet long, but the lengths of the long sides are unknown. What equatio

Question

The perimeter of a rectangle is 245 feet. The short sides are each 30 feet long, but the lengths of the long sides are unknown. What equation represents this situation?

in progress 0
Ngọc Khuê 6 months 2021-07-19T08:32:35+00:00 1 Answers 2 views 0

Answers ( )

    0
    2021-07-19T08:34:33+00:00

    Answer:

    2(30) + 2x = 245

    Step-by-step explanation:

    As u know a rectangle has four sides, two equally long sides and two equally short sides. If each of the short sides are 30, that means 30 times 2 adding the 2 missing long sides would equal 245. So the long sides are going to be represented with x in this equation:

    2(30) + 2x = 245

    To make sure our equation is right, lets try solving it:

    2(30) + 2x = 245

    60 + 2x = 245

    subtract 60 from both sides

    2x = 185

    x = 92.5

    Now put 92.5 in the equation instead of x to confirm:

    2(30) + 2(92.5) = 245

    60 + 185 = 245

    245 = 245

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )