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mash [69]
3 years ago
10

Find the output for each input of y = -2x.

Mathematics
2 answers:
VashaNatasha [74]3 years ago
4 0
The 2nd choice down in correct.
melisa1 [442]3 years ago
3 0
2nd one is correct ik this for a fact i just done it
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1.2,3,7.5,18.75, which formula can be used to describe the sequence
elena-14-01-66 [18.8K]

Answer:

a_{n}=1.2 \times(2.5)^{n-1}

Step-by-step explanation:

If we observe the given sequence, we find that the ratio of two consecutive terms is the same. i.e.

\frac{3}{1.2}=2.5\\\\\frac{7.5}{3}=2.5\\\\ \frac{18.75}{7.5}=2.5

Such a sequence in which the ratio of consecutive terms remain the same is know as Geometric Sequence. Following formula is used to represent a Geometric Sequence:

a_{n}=a_{1}\times(r)^{n-1}

Here:

a_{n} is the general term. Using the value of n =1,2,3 ... will give us the term of the sequence.

a_{1} is the first term which is 1.2 in this case.

r represents the common ratio which is 2.5.

Using these values we get:

a_{n}=1.2 \times(2.5)^{n-1}

This formula can be used to represent the given sequence.

3 0
4 years ago
-5x - 3y = -168<br> X = 5y
Mandarinka [93]

Answer:

-9  thats what my friend told me

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Can someone please help me with this portfolio?
Eduardwww [97]
If u have any doubts ask me
please mark as brainliest

3 0
4 years ago
Y = (x - 1) to the second power + 2
Nikolay [14]
Y = (x - 1)² + 2
y = (x² - x - x + 1) + 2
y = (x² - 2x + 1) + 2
y = x² - 2x + (1 + 2)
y = x² - 2x + 3
x² - 2x + 3 = 0
x = <u>-(-2) +/- √((-2)²  4(1)(3))</u>
                     2(1)
x = <u>2 +/- √(4 + 12)</u>
                2
x = <u>2 +/- √(16)
</u>             2<u>
</u>x = <u>2 +/- 4
</u>           2<u>
</u>x = 1 <u>+</u> 2
x = 1 + 2      x = 1 - 2
x = 3            x = -1
y = x² - 2x + 3
y = (3)² - 2(3) + 3
y = 9 - 6 + 3
y = 3 + 3
y = 6
(x, y) = (3, 6)
or
y = x² - 2x + 3
y = (-2)² - 2(-1) + 3
y = 4 + 2 + 3
y = 6 + 3
y = 9
(x, y) = (-1, 9)
5 0
4 years ago
How many Halves does 4 have?
nadya68 [22]

Answer:

4 has 8 halves.

Step-by-step explanation:

To find the answer, we already know that 2 halves make up 1. So, multiply 2 by 4 to get 8 halves. Therefore, the answer is 8 halves.

Mark brainliest if ya don't mind!

5 0
3 years ago
Read 2 more answers
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