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katrin2010 [14]
3 years ago
15

2x + 4y = 14 and 3x – 4y = -39 solve by elimination

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
5 0

Answer: x=-5 and y=6

Step-by-step explanation: i hope i did it right tell if i didnt

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Answer:

A and B are the answers on Edge.

Step-by-step explanation:

3 0
3 years ago
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Sandy had five seashells she gave mageret 3 of them how many are left?
erma4kov [3.2K]
Total shells Sandy had = 5
Shells Mageret got         = 3
Balance of Seashells 
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3 years ago
Jared can ran 4 miles in 1/2 hour. What is his average speed in miles per hour? (how many miles can he run in 1 hour)
evablogger [386]

Answer: His average speed is 8 miles an hour

Step-by-step explanation: First, two halves make a whole, so we simply multiply how many miles he ran in half an hour by 2!

4 x 2 = 8

Hope this helps :)

4 0
3 years ago
Help? I can't seem to understand arithmegic sequence.
katrin2010 [14]

A sequence \{a_n\} is arithmetic if the difference between consecutive terms is some fixed number, regardless of which pair of consecutive terms you pick out of the sequence.

For example, the following sequences are arithmetic:

1, 2, 3, 4, 5, 6, ... (difference = 1)

-25, -20, -15, -10, -5, ... (difference = 5)

2. Carla's sequence is not arithmetic, because the differences between consecutive terms are all different:

13 - 11 = 2

17 - 13 = 4

25 - 17 = 8

She can adjust the sequence by changing the last two numbers to 15 and 17, since this makes the difference fixed:

13 - 11 = 2

15 - 13 = 2

17 - 15 = 2

and so on.

3. The sequence

45, 48, 51, 54, ...

is arithmetic with difference 3 between terms. Recursively, we can write the nth term, a_n, in terms of the previous, (n-1)th term, a_{n-1}:

a_n=a_{n-1}+3

By this definition, we can just as easily write the (n-1)th term in terms of the (n-2)th term:

a_{n-1}=a_{n-2}+3

Then, substituting this into the previous equation, we have

a_n=(a_{n-2}+3)+3=a_{n-2}+2\cdot3

We can continue this process to write a_n in terms of a_1:

a_{n-2}=a_{n-3}+3\implies a_n=a_{n-3}+3\cdot3

a_{n-3}=a_{n-4}+3\implies a_n=a_{n-4}+4\cdot3

and so on. (You might notice that the subscript of the term on the right side, and the number of 3s being added, together sum to n.) The pattern continues down to

a_n=a_1+(n-1)\cdot3

The first term in this sequence is a_1=45, so we have

a. a_n=45+3(n-1)=42+3n

where n=1,2,3,\ldots.

b. You can fill in the blanks by just adding 3 to the previous term:

45, 48, 51, 54, <u>57</u>, 60, <u>63</u>, 66, 69, ...

Then, using the formula found in (a), the 15th term of the sequence is

a_{15}=42+3\cdot15=87

4 0
3 years ago
Help please thanks math is hard
leonid [27]
X= 25
Explanation:
The two lines are equal. Since 48+16= 64,
the other line has to equal 64 as well.
64-39= 25
8 0
3 years ago
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