The dimensions of the bulletin board is 2 ft and 9 ft.
Let the width of board = x
Then, the length of board = 7+x
Area of board = 18 ft²
Area of rectangle = L×W
so, (7+x) × x = 18 ft²
7x + x² = 18 ft²
7x + x² + 18 = 0
x² + 9x -2x -18 = 0
x(x+9) -2(x+9) = 0
(x+9) (x-2) = 0
x+9 =0, x -2 = 0
Dimension can not be in negative number, so
x = 2, Width = 2 ft
Length = 2+7 = 9 ft
Hence, the dimensions of board will be:
The width of board = 2 ft
And, the length of bard = 9 ft.
Answer:
Percent error of Martha's estimation is 18.48%.
Step-by-step explanation:
The number of estimated marbles in a jar = 97
The number of actual marbles in a jar = 119
Now, ERROR = ACTUAL VALUE - ESTIMATED VALUE
= 119 - 97 = 22
So, the error in counting marbles = 22 marbles.
Now,
or, Percentage error = 18.48%
Hence, percent error of Martha's estimation is 18.48%.
Found this on google to help you out but it states “ Find the first derivative of a function f(x) and find the critical numbers. Then, find the second derivative of a function f(x) and put the critical numbers. If the value is negative, the function has relative maxima at that point, if the value is positive, the function has relative maxima at that point.”
Answer:
Either 43 or 44, depemding on if you round up.