Answer:
28.95
Step-by-step explanation:
x+2.45=31.4
x=31.4-2.45
x=28.95
Answer:
Construct a perpendicular bisector to line AB.
Step-by-step explanation:
Given:
The end points of the line segment AB are A(-2,-3) and B(4,-1).
The rule of translation is:

To find:
The coordinates of the end points of the line segment A'B'.
Solution:
It is given that the end points of the line segment AB are A(-2,-3) and B(4,-1).
We have,

By using the above translation rule, we get


And


Hence, the endpoint of the line segment A'B' are A'(2,-6) and B'(8,-4).
Answer:
B. 10n-207
Step-by-step explanation:
Given,
The average number of points of 9 games = 23,
∵ Sum of observations = their average × number of observations
So, the total points for 9 games = 9 × 23 = 207,
Now, if the average of 10 games is n,
Then the total points for 10 games = 10n,
Hence, the number of points earned in 10th game = the total points for 10 games - the total points for 9 games
= 10n - 207
i.e. OPTION B is correct.