yn = 1/2n2 + 2 1/2n + 3
y9 = 1/2(9)2 + 2 1/2(9) + 3
y9 = 40 1/2 + 22 1/2 + 3
y9 = 66
The Next NumberThe next number is 25 if you use the following pattern: 5, (the number 10), 15 (the first number +10), (the number 10), and the next number is the third number +10 or 25.or you could think of it this way:5, 10 (+5), 15 (+5), -5 (10)The pattern is +5, +5, -5, so the next number would be 15, the next 20, and the next 15.
21: (3)+3=(6)+4=(10)+5=(15)+6=(21)
is this question number 10? 4n - 1 creates the pattern 3, 7, 11, 15, 19, etc.
there is not much of a pattern there but i would say 45
Each consecutive number is being divided by 10
5+5 = 10 10+5 = 15 15-5 = 15 10+5 = 15
15. 5 - -10 = 5 + 10 = 15 → 15 + -10 = 15 - 10 = 5
5 x 10 to the 9th power is equal to 5 billion. When you multiply 5 by 10 raised to the 9th power, you are essentially multiplying 5 by 1 followed by 9 zeros. This results in a large number that is commonly expressed in scientific notation as 5 x 10^9.
What would be the next number in this series 15 12 13 10 11 8?
The rule is 5, 10, 15 and so the next number will be 20+31 = 51
10 + 15a * * * * * No! It is 10 + n/15
5 10 15 10 5