4. WALLPAPER A decorative wallpaper
strip has an area of 50 + 20r. If the
width of the strip is 5 inches, what
expression represents the length of the
strip?
So far I have that their GCF is 5?
OK, you got that far, so factor out the 5
50+20r = 5(10+4r)
Since the width is the 5, the length is 10+4r
area = width * length
n^2-12+4n
To find the expression that represents the length of the strip, we can use the given information.
The area of the decorative wallpaper strip is given as 50 + 20r, where "r" represents some unknown value. We are also given that the width of the strip is 5 inches.
We can use the formula for the area of a rectangle, which is length multiplied by width, to derive the expression for the length of the strip.
Area = Length × Width
Substituting the given information into the formula, we have:
50 + 20r = Length × 5
To find the expression for the length, we need to solve this equation for Length.
Divide both sides of the equation by 5 to isolate Length:
(50 + 20r) / 5 = Length
Simplify the expression:
10 + 4r = Length
Therefore, the expression that represents the length of the strip is "10 + 4r".