2.6925 is the mean/ avg you add all the numbers and divide by the amount of numbers you added
Let the number be xy ,
xy = 10x + y. when reversed = yx = 10y + x
x = 2y ........(a)
10x + y + 10y + x = 66.........(b)
10(2y) + y + 10y + 2y = 66
20y + y + 10y + 2y = 66
33y = 66
y = 66/33
y = 2
x = 2y = 2*2 = 4
Recall the original number is xy = 42.
Answer: D' is (-8,4)
Step-by-step explanation: The rule for reflection y=x is (x,y)>( y,x) So when relecting over the axis y=x the x cordinate and the y cordinate switch places.
I will show how to do it:
Step 1: Start your point at 3 in the y axis (line going upwards)
Step 2: Move up twice.
Step 3: Now go to the right once.
Step 4: Use a ruler to draw the line.
Step 5: Cross check by picking two points that are on the line. Or use the formula - y2 - y1 / x2 - x1
