Question

Which equation can be used to find the answer?

A garden with four sides has a perimeter of 45 ft. Three of the sides have lengths of 7 ft, 14 ft, and 13 ft. What is the length of the fourth side?

A.
s – 7 – 14 – 13 = 45
s = 79
79 ft

B.
s – 45 = 7 + 14 – 13
s = 53
53 ft

C.
s – 7 + 14 + 13 = 45
s = 25
25 ft

D.
s + 7 + 14 + 13 = 45
s = 11
11 ft

Answer 1

To solve this, you would first need to know what a "perimeter" is........do you know what makes up a perimeter?

Answer 2

yes if theres a sqare its all the sides aded

Answer 3

Good, well this is not square, but it is as you as the sum of all 4 sides. You are given the length of three sides, so to solve for the fourth side (s) we would need to sum up the three given sides and subtract from the given perimeter of 45. Are actually we would sum up the four sides giving the unknown side a label s. That sum would be:
s +7 + 14 + 13 and that would be equal to the perimeter of 45. Which of the four given solutions does that?

Answer 4

typo change *as to say.

Answer 5

A. is subtracting, so you can rule out that one.
B. Has a solution of 53 ft which is longer than the perimeter of 45, rule out that one too.

Answer 6

That leaves the last two, can you determine which one it is???

Answer 7

answer is D