The correct answer is the first one. a=(2A/h)-b
The value of A is RM 205.
Since Billy gave money to a charity over a 20 year period, from Year 1 to Year 20 inclusive, and he gave RM150 in Year 1, RM160 in Year 2, RM170 in year 3, and so on, and Kevin also gave money to the charity over the same 20 years period, but he gave RMA im Year 1 and the amount of money he gave each year increased, forming an arithmetic sequence with common difference RM30, and the total amount of money that Kevin gave over 20 years period was twice the total amount of money that Billy gave, to calculate the value of A the following calculation must be performed:
- Billy = (150 x 20) + 10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 + 100 + 110 + 120 + 130 + 140 + 150 + 160 + 170 + 180 + 190
- Billy = (150 x 20) + 1900
- Billy = 3000 + 1900
- Billy = 4900
- Kevin = (9800 - (30 + 60 + 90 + 120 + 150 + 180 + 210 + 240 + 270 + 300 + 330 + 360 + 390 + 420 + 450 + 480 + 510 + 540 + 570)) / 20
- Kevin = (9800 - 5700) / 20
- Kevin = 4100/20
- Kevin = 205
Therefore, the value of A is RM 205.
Learn more in brainly.com/question/24037604
If AOC and BOD are vertical angles, the value of x is x = -6.5
<h3>How to determine the value of x?</h3>
The angles are given as:
m AOC = 26
m BOD = (2x+39).
From the question, we have
AOC and BOD are vertical angles
Vertical angles are equal.
So, we have:
AOC = BOD
Substitute the known values in the above equation
2x + 39 = 26
Subtract 39 from both sides
2x = -13
Divide bot sides by 2
x = -6.5
Hence, if AOC and BOD are vertical angles, the value of x is x = -6.5
Read more about vertical angles at
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Answer:
0.5
because it is a standard deviation
The answer is D. Hope it helps!