Answer:
7 3/5 or 38/5
Step-by-step explanation:
13 2/5 - 5 4/5 = 38/5 = 7 3/5
120 cupcakes
Even # rows
Odd # columns
12: 1, 2,3,4,6, 12 (integers?)
I see only one arrangement with odd column & even rows
3 columns, 40 rows
That's mainly because 120 is an even number.
Answer:
Margin of Error = 0.5
Step-by-step explanation:
Using this formula Z (s/√n)
Where
S = 1.8----------------------------- Standard Deviation
n = 36 ----------------------------------Number of observation
Z = 1.645 ------------------------------The chosen Z-value from the confidence table below
Confidence Interval || Z
80%. || 1.282
85% || 1.440
90%. || 1.645
95%. || 1.960
99%. || 2.576
99.5% || 2.807
99.9%. || 3.291
Substituting these values in the formula
Margin of Error = 1.645 * (1.8/√36)
Margin of Error = 1.645 * (1.8/6)
Margin of Error = 1.645 * 0.3
Margin of Error = 0.4935
Margin of Error = 0.5 (Approximated)
Isolate the variable on one side of the equation and everything else to the opposite side of the variable.
You can isolate the variable by undoing the operations done to the variable.
For example, if we added 5 to x (x + 5) then we would need to undo that operation. We would need to use the inverse of addition. Which is subtraction.
5x + 6 = 2(2x - 3)
5x + 6 = 4x - 6 <-- Distribute the 2
x + 6 = -6 <-- Subtract 4x from each side
x = -12 <-- Subtract 6 from each side
So, x is equal to -12.