In a symmetric distribution, better known as the Gaussian or normal distribution, two thirds of the observations or 66.67% of the observation belongs to the area between the -3∅ to +3∅ where ∅ is the standard deviation of the group. it is assumed here that the mean is 1 and the area under the curve is also 1.
He probably won't get too suspicious if you get 100% on three quizzes when you regularly get A's in that class. A ninety-something percent jump to a 100 is less than a 10-point increase.
That being said, it's still best to learn the math so that you don't become dependent on using Brainly for every question. Maybe only use it when you're having a lot of trouble with a particular problem or concept; but some of the explanations on here are actually really helpful in teaching things.
Answer:
The discount which she received is 25 %
Step-by-step explanation:
Given as :
The original price of scarf = $ 16
The selling price of scarf = $ 12
Let The discount percentage = d %
So,
Discount percentage = × 100
or, d % = × 100
Or, d % =
∴ d = 25%
Hence The discount which she received is 25 % Answer
Answer:
D. large
Step-by-step explanation:
Let
x---------> length original square side
x1--------> length resulting rectangle
y1--------> wide resulting rectangle
A1--------> area resulting rectangle
we know that
x1=x+2
y1=x-2
A1=60 in²
60=(x+2)*(x-2)--------> 60=x²-2x+2x-4-------> 60=x²-4------> x²=64
x1=8
x2=-8
the solution is
x=8 in
<span>the area of the original square is 8*8-------> 64 in</span>²
the answer is 64 in²