Increase 220 by 15% please

Answers

Answer 1

Answer: Lets do this step by step.

1st.) what is 15% as a decimal
15% = 0.15

2nd.) multiply
220 x 0.15 = 33

3rd) we add that 33 and 220 since this its asking for the increase
220 + 33 = 253

Answer = 253

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Find the mean of this set of numbers.9, –6, –8, 11, –4, 10

A.
48

B.
2

C.
12

D.
8

Answers

b. 2

The mean is 12 divided by 6, or 2.

Suppose y = 48 + 3(2n - 1) is an explicit representation of an arithmetic sequence for integer values n ≥ 1. Find the xth partial sum of the series, as a quadratic function, where x represents the term number.

Answers

Answer: 3x2 + 51x

Step-by-step explanation:

$a_n=48+3(2n-1)$

The formula of the sum of the arithmetic sequence:
$S_n=(a_1+a__n)/(2)\cdot n$
calculate:
$a_1=48+3(2\cdot1-1)=48+3=51$
substitute
$S_n=(51+48+3(2n-1))/(2)\cdot n=(99+6n-3)/(2)\cdot n=(96+6n)/(2)\cdot n=3n^2+48n$
Your answer is:
$\boxed{f(x)=3x^2+48x}$

What is the first four sequence an=n2-1