One method to see it's a trapezoid is to find the slope of lines BC and AD.
The slope formula is
m = (y2-y1)/(x2-x1)
You should find that BC and AD both have the same slope (of -1), so that means the lines are parallel. That proves we have a trapezoid.
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To prove this trapezoid is isosceles, you can use the distance formula

to find the lengths of AB and CD (the two non-parallel sides). You should find that AB = CD.
Because AB and CD are horizontal and vertical respectively, this means you can simply count out the spaces to find that AB and CD are 3 units each. For any other rotated version of this trapezoid, use the distance formula instead.
Answer:
x= -1/3
Step-by-step explanation:
You take out 2 by multiplying 2/1 in both sides
then u have 4-3x=5
You subtract 4 from 5 and you have
-3x=1
divide and the answer is x= -1/3
Answer:
A least-squares solution of is a vector such that for all in .
C. The statement is true because the general least-squares problem attempts to find an that maximizes .
Step-by-step explanation:
The above statement is actually the one that validates the least-square solution statement.
Answer:

Step-by-step explanation:
we have

Solve for h
That means ----> isolate the variable h
step 1
Multiply by 6 both sides

step 2
Divide by
both sides
