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3 years ago

10

Please answer this math

1 answer:

ohaa [14]3 years ago

3 0

6 cm squared I believe

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The third term of an arithmetic sequence is 15 and when 20 is added to the third term the

djyliett [7]

Answer:

Common difference = 4

Position of 103 = 25th term

Step-by-step explanation:

a)

According to the given information:

$a_3 + 20 = a_8$

$a+ (3-1)d + 20 = a+ (8-1)d$

$\cancel a+ 2d + 20 = \cancel a + 7d$

$2d + 20 = 7d$

$20 = 7d-2d$

$20 = 5d$

$d = \frac{20}{5}$

$\purple {\bold {d = 4}}$

Common difference = 4

b)

$\because a_3 = 15....(given)$

$\therefore a + (3-1)d = 15$

$\therefore a + 2d = 15$

$\therefore a + 2\times 4= 15$

$\therefore a + 8= 15$

$\therefore a = 15-8$

$\red{\bold {\therefore a = 7}}$

$\because a_n = a + (n - 1) d$

$\therefore 103 = 7 + (n - 1)4$

$\therefore 103 - 7 = (n - 1)4$

$\therefore 96 = (n - 1)4$

$\therefore \frac{96}{4}= n - 1$

$\therefore 24= n - 1$

$\therefore 24+1= n$

$\blue{\bold {\therefore n = 25}}$

So, the position of 103 in this sequence is 25th term.

8 0

3 years ago

Please hurry<br> Which is a factor of x2+ 7x + 10?

ohaa [14]

Answer:

x+5

Step-by-step explanation:

x^2+7x+10=0

(x+5)(x+2)=0

The only factor on that list is x+5, meaning that it is the answer. Hope this helps!

4 0

3 years ago

You choose two different movies on a list at random. Out of 15 movies on the list, 9 are action movies. The first movie you choo

docker41 [41]

Answer:

the probability is 8/15 depending on whether the problem counts the drawing one out of the bag as one gone. Leaving the first one drawn, the probability would be 3/5.

Step-by-step explanation:

number of action movies/total number of movies= 9/15=3/5

3/5 is the probability of drawing an action movie from the bag. However, since you just drew one out, the fraction changes to 8/15.

5 0

3 years ago

I need help with this asap

babymother [125]

3/4 I believe because its less than 4/5 but more than 2/3

7 0

3 years ago

Read 2 more answers

What is the least common multiple of 4 and 6? *<br><br> 1. 24<br> 2. 12<br> 3. 4<br> 4. 6

azamat

Answer:

12

Step-by-step explanation:

6 0

3 years ago