Answer:
An equilateral triangle cannot be similar to a right triangle, whereas an isosceles triangle can be similar to a right triangle.
Step-by-step explanation:
A right triangle must have a 90º angle, so it cannot be equilateral in side length and angle since the figure would no longer be a triangle.
I<u>s</u>o<u>s</u>celes triangles have two <u>s</u>ame <u>s</u>ides, so two equal angles. A right triangle can be a 45º, 45º, and 90º.
Can you please show a picture of the graph? Otherwise, no one can help you. Or at least tell me what is the graph.
Standard deviation is calculated by
1. calculate mean, m
2. calculate deviation of EACH entry of data set from the mean, i.e.
d=(x-m)
3. calculate mean of square of deviations (d^2)/n to get variance,v
4. take square-root of variance to get standard deviation.
For example,
To find the standard deviation of data set {3,7,8}
1. mean=(3+7+8)/3=6
2. deviations, di={3-6,7-6,8-6}={-3,1,2}
3. squares of deviations, di^2={9,1,4}
4. mean of squares of deviations=(9+1+4)/3=14/3
Standard deviation=sqrt(14/3)=2.16
For the given data set, if you follow the above steps, you would get
sum=400
mean=400/9
variance (mean square of deviations)=8246/81
standard deviation=sqrt(8246/81)=sqrt(8246)/9
It's D I think? I might be wrong, but it cant be A or B because if you plug in 0 as x it doesnt give you the y-intercept of 3 for either. I would wait for another answer just in case though :)
