Correct answer to the question is letter b
The area of a surface is the number of square units present in the surface. For a rectangle, it is calculated from the product of the length and the width. To determine the length and width of the lot given above, we first assume that it is in a rectangular shape which is defined by its length and its width. We are given the following:
Area = 4200 square feet
Length = 4x - 20 feet
Width = x feet
From the definition of the area of a rectangle,
Area = length x width
4200 = (4x -20) (x)
4200 = 4x^2 - 20x
4x^2 - 20x - 4200 = 0
4(x^2 - 5x - 1050) = 0
x^2 - 5x -1050 = 0
Factoring the equation would lead to:
(x - 35) (x +30) = 0
x -35 = 0 ; x = 35
x + 30 = 0 ; x = -30
The width should not be a negative value so the width would be equal to 35 feet. So, the length would be
Length = 4(35) - 20 = 120 feet
Answer:
18x+27y
Step-by-step explanation:
Answer:
87.92 square inches
Step-by-step explanation:
Surface area for cylinder is given by 
where r is the radius and h is the height of cylinder.
Given that candle is cylindrical in shape
Thus, Surface area for candle is calculated as given below\\
Thus, total surface area for candle is 87.92 square inches.
Answer:
x = -7
x = 4
Step-by-step explanation:
