The answer is 140.
If there are 140 hamburgers sold, and there were 2x as many cheeseburgers sold, that adds up to 420.
140 x 2 = 280 (Cheeseburgers)
So there were 280 cheeseburgers sold.
280 (Cheeseburgers) + 140 (Hamburgers) = 420 altogether.
Hope this helps!
The sum of the sum notation ∞Σn=1 2(1/5)^n-1 is S= 5/2
<h3>How to determine the sum of the notation?</h3>
The sum notation is given as:
∞Σn=1 2(1/5)^n-1
The above notation is a geometric sequence with the following parameters
- Initial value, a = 2
- Common ratio, r = 1/5
The sum is then calculated as
S = a/(1 - r)
The equation becomes
S = 2/(1 - 1/5)
Evaluate the difference
S = 2/(4/5)
Express the equation as products
S = 2 * 5/4
Solve the expression
S= 5/2
Hence, the sum of the sum notation ∞Σn=1 2(1/5)^n-1 is S= 5/2
Read more about sum notation at
brainly.com/question/542712
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Answer:
x = 76.58°
Step-by-step explanation:
hyp = 13.41
tan = opp/adj
tan = 1/2 = 26.57
x = 76.58
A binomial squared is written like
So, we have 
So, we want to complete the square 
We can add and subtract 9 to write
