Answer:
B. 8/5.
Step-by-step explanation:
We find this by dividing the lengths of the corresponding sides.
Scale factor = 40 / 25
= 8/5.
Standard error (SE)

Or

Therefore, SE of the mean = (8)/(2) =4
Step-by-step explanation:
and the same principle here :
a line is intersecting 2 parallel lines.
the intersection angle must be the same for both parallel lines, otherwise they would not be parallel ...
so,
11x + 7 = 9x + 13
2x + 7 = 13
2x = 6
x = 3
Answer:
About 23.9 in
Step-by-step explanation:
We are given ;
a circle whose radius is 3.8 inches
we are required to determine the circumference
The circumference is given by the formula;
=2πr
Therefore;
Circumference = 2×3.14×3.8 in
=23.864 in
= 23.9 in
Therefore, the circumference of the figure is about 23.9 in