Ask question

Ask question

All categories

2 years ago

13

What is the sum of the arithmetic series below?

1 answer:

never [62]2 years ago

5 0

Our question transforms to finding the following sum : 3 + 7 + 11 + 15.... upto 15 terms

<span>Use formula for sum of an AP series </span>

<span>S = (n * (2a + (n - 1)d)) / 2 </span>

<span>n -> no of terms in AP series , so n = 15 </span>
<span>a -> first term in series, so a = 3 </span>
<span>d -> common difference, so d = 4 </span>

<span>Put all values for a, n, d and you will get the sum.</span>

You might be interested in

Ms. Bradshaw bakes a whole chocolate cake. Logan ate 3/10 of the cake on Monday and 1/10 of the cake on Tuesday. What fraction o

natima [27]

1/10+3/10=4/10
10-4=6
6/10 was left

5 0

2 years ago

The probability distribution for a random variable x is given in the table X: -5,-3,-2,0,2,3 Probability: .17,.13,.33,.16,.11,.1

Ivan

Answer:

0.6 probability that $-2 \leq x \leq 2$

Step-by-step explanation:

The probability distribution is given in the table.

Probability that x is between -2 and 2.

Between -2 and 2, inclusive, we have -2, 0 and 2. So

$P(-2 \leq x \leq 2) = P(X = -2) + P(X = 0) + P(X = 2)$

From the table:

$P(X = -2) = 0.33, P(X = 0) = 0.16, P(X = 2) = 0.11$ . So

$P(-2 \leq x \leq 2) = P(X = -2) + P(X = 0) + P(X = 2) = 0.33 + 0.16 + 0.11 = 0.60$

0.6 probability that $-2 \leq x \leq 2$

4 0

2 years ago

What is the slope of a line perpendicular to the line whose equation is y = 2x+5?

zubka84 [21]

Answer:

slope = - $\frac{1}{2}$

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 2x + 5 is in this form with slope m = 2

Given a line with slope m then the slope of a line perpendicular to it is

$m_{perpendicular}$ = - $\frac{1}{m}$ = - $\frac{1}{2}$

4 0

2 years ago

Read 2 more answers

Fiona wrote out the description of each step for her multiplication of the binomial and trinomial (2x – 3)(5x2 – 2x + 7).

Valentin [98]

Answer:

Step 2

Step-by-step explanation:

Fiona did mistake step 2.

Use the distributive property to multiply -3 times each term in the trinomial.

The correct result is

-3(5x^2 - 2x + 7) = -15x^2 + 6x - 21

Fiona written -6x instead of + 6x.

That's the error.

The answer is "Step 2"

Hope you will understand the concept.

Thank you.

5 0

3 years ago

Read 2 more answers

Twenty-four players divided into three teams?

avanturin [10]

24÷3=8

There will be eight players on each team.

8 0

3 years ago

Read 2 more answers