Answer:
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Step-by-step explanation:
Given
Required
The standard deviation
First, calculate the expected value E(x)
So, we have:
Next, calculate E(x^2)
So, we have:
The standard deviation is:
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Answer:
If the 2 numbers are the same, it will be zero. If the positive number is larger than the negative number, the sum will be positive. If the negative number is larger than the positive number, then the sum will be a negative number.
Step-by-step explanation:
Answer:
x=1/2
x=-o.5, x=-2
Step-by-step explanation:
To find x intercept/zero, substitue f(x)= 0-0 which gives you 0=2x+1. Then you solve for x to get x=-1/2 which is the answer. x=-o.5, x=-2 is the alterative form. Pls mark as brainlist if right.
7x13=91 meaning 13 pies were made in total. Since the cafeteria contributed 3 we can subtract 3 from 13. Ultimately meaning that the club contributed 10 pies.
The answer is 10.
Sale price for coat =
275 x 0.85 (decimal multiplier for 15% decrease) = £233.75
£233.75 x 1.0725 (decimal multiplier for 7.25% increase) = £250.70