<span>In real world variables can be used to represent variable quantities in situations and in patterns.
Example: fishing. When we are fishing and we catch a fish, the fish can be represented with a variable. </span><span> It is particular fish, and we know some facts (the fish swims, it has gills, its size) , but we do not know other details about the fish (exactly which type of fish it is).</span>
X - unit of length
w,l - the sides of a rectangle
7 : 2 ⇒ 7x : 2x
Perimeter: P = 207cm
Perimeter: P = 2w + 2l
therefore: 2w + 2l = 207 |divide both sides by 2
w + l = 103.5 (cm)
w : l = 7 : 2 ⇒ w : l = 7x : 2x ⇒ w = 7x; l = 2x
subtitute
7x + 2x = 103.5
9x = 103.5 |divide both sides by 9
x = 11.5 (cm)
7x = 7 · 11.5cm = 80.5cm
2x = 2 · 11.5cm = 23cm
w = 80.5cm; l = 23cm
Area = wl
Area: A = 80.5cm · 23cm = 1851.5cm²
Answer:
This is a terminating decimal.
Step-by-step explanation:
11/20 = 0.55
Answer:
Answer is 5 °C.
Step-by-step explanation:
5 is answer
Hello from MrBillDoesMath!
Answer:
x = 140
Discussion:
Please clarify! It appears from the diagram that x + 40 = 180 (nothing to do with parallel lines). Then
x + 40 = 180 => subtract 40 from each side
x + 40 - 40 = 180 -40
x = 140
I doubt this is what was meant. I will update this answer if you provide more info.
BTW: y = 40 degrees as alternate interior angles created by a transversal cutting parallel lines are equal.
Thank you,
MrB