3 years ago

Which of the following is the next number in the series 3,6,4,9,5,12,6,_

1 answer:

8 0

The next term should be 15.
first ignore the 1st, 3rd, 5th, 7th term, they're just adding 1. and the other terms left are the multiplies of 3. 6,9,12,15...

You might be interested in

9. Find the sum of the first 6 terms of the sequence: –3, 1, 5, 9, . . . options: A) 25 B) 48 C) 42

ZanzabumX [31]

Answer:

C. 42.

Step-by-step explanation:

This is an arithmetic sequence with common difference d = 4 and first term a = -3.

Sum of n terms = (n/2)[2a + (n - 1)d]

Sum of six terms = (6/2)[2(-3) + (6 - 1)4]

= 3 * (-6 + 20)

= 42.

5 0

3 years ago

Read 2 more answers

Find the value of x.

lawyer [7]

Answer:

$\huge\boxed{x=\sqrt{70}}$

Step-by-step explanation:

ΔABC and ΔADB are similar (AAA).

Therefore the corresponging sides are in proportion:

$\dfrac{AB}{AD}=\dfrac{AC}{AB}$

Substitute:

$AB=x\\AC=7+3=10\\AD=7$

$\dfrac{x}{7}=\dfrac{10}{x}$ <em>cross multiply</em>

$(x)(x)=(7)(10)\\\\x^2=70\to x=\sqrt{70}$

4 0

3 years ago

Simplify 3^8 x 3^4 / 3^2 x 3^8 leaving your answer in index form

Furkat [3]

Answer:

3² or 9

Step-by-step explanation:

Step 1: Add exponents

$\frac{3^{12}}{3^{10}}$

Step 2: Subtract exponents

You should get 3² because of exponent rules. Remember when you multiply exponents you add the powers and when you divide exponents you subtract the powers.

3 0

3 years ago

Read 2 more answers

R= 8.4 in<br> Calculate the diameter of the<br> circle.

Hunter-Best [27]

Answer:

The diameter is 16.8

Step-by-step explanation:

The diameter is double the radius.

7 0

2 years ago

Read 2 more answers