Let; x = side length
perimeter = 4x
since it's a square, with equal sides, the perimeter will always be proportional to it's side length. increase the side, increases the perimeter.
proportional: two quantities having the same constant ratio or relation. The quantities x and y are proportional if:
y/x = k
where k is the constant of proportionality.
4x/x = 4
k = 4
Estimation:
23 --> rounded to 20
71 --> rounded to 70
70 + 20 = 90. I rounded both numbers down so the exact sum must be only a little greater than my estimate.
Answer:
Correct options,
a) 
c)
and ∠A = ∠X
Step-by-step explanation:
Given : ΔABC ≅ Δ XYZ
We have choose out of given options that correctly prove that ΔABC ≅ Δ XYZ
Two triangles are said to be similar when their corresponding sides are in same ratio and the measure of their corresponding angles are equal.
That is 
and ∠ A = ∠X , ∠ B = ∠Y AND ∠C = ∠Z
Also ,
We have conditions for two triangle to be similar.
1) SSS : When the ratio of all the three sides of a triangle are equal.
that is 
2) SAS: When the ratio of two corresponding sides are equal and the measure of angle between those sides are equal
and ∠ A = ∠X
Thus, Out of given options,
a) 
c)
and ∠A = ∠X
125 = 6 dimes = 60 and 13 nickles = 65
60+65= 125
Hope i was the brainliest asnwer.
Answer:
x<9
Step-by-step explanation: