3 years ago

Y

Mathematics

1 answer:

-Dominant- [34]3 years ago

4 0

A is the correct answer

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<img src="https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20-%2018%20%3C%200" id="TexFormula1" title=" {x}^{2} - 18 < 0" alt

NARA [144]

Answer

-sqrt(18)<x<sqrt(18)

Step-by-step explanation:

Factorise:(x-sqrt(18))(x+sqrt(18))<0
Critical values:-sqrt18 and sqrt18
Use number line or graphical method

8 0

3 years ago

How to write the rule 4,-4,-12,-20 going to a20

maks197457 [2]

Are you meaning on a graph or a number line?

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3 years ago

Write a Mathematical proof to show (3x)(5y)(7z) is equivalent to 105xyz

larisa86 [58]

=3*5*7 (xyz)
=15*7 xyz
=105xyz

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3 years ago

Read 2 more answers

If the second term of a geometric sequence of real numbers is -2 and the fifth term is 16 then what is the fourteenth term?

Agata [3.3K]

<h3>Given</h3>

A geometric sequence such that ...

$a_2=-2\quad\text{and}\quad a_5=16$

$a_{14}$

<h3>Solution</h3>

We can use the ratio of the given terms to find the common ratio of the sequence, then use that to find the desired term from one of the given terms. We don't actually need the common ratio (-2). All we need is its cube (-8).

$a_2=a_1r^{(2-1)}=a_1r^1\\a_5=a_1r^{(5-1)}=a_1r^4\\a_{14}=a_1r^{(14-1)}=a_1r^13=a_5r^9\\\\\dfrac{a_5}{a_2}=\dfrac{a_1r^4}{a_1r^1}=r^3=\dfrac{16}{-2}=-8\\\\r^9=\left(r^3\right)^3=(-8)^3=-512\\a_{14}=a_5(-512)\\\\a_{14}=-8192$

7 0

3 years ago

What's the value of x in the equation: 10x-6=5x34

Snowcat [4.5K]

Answer:

Step-by-step explanation:

10x-6=5x+34

-5x -5x

5x-6=34

+6 +6

5x=40

---- ----

5 5

x= 8

// have a great day //

8 0

3 years ago