3 years ago

18 is the geometric mean between 4 and 9. A.) True B.) False

Mathematics

2 answers:

Mademuasel [1]3 years ago

8 0

Im thinking it's false. 18 isn't even between 4 and 9.

riadik2000 [5.3K]3 years ago

7 0

False because the mean is when you add all the numbers and divide it by how ever many numbers are there so 4+9=13 then do 13 divided by 2

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MAVERICK [17]

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6 0

3 years ago

What is the factorization of the trinomial below -x^2+x+42

aksik [14]

For the given trinomial

$a=-1, b=1 ,c=42$

We need to multiply a by c
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We split the middle term with these two factors
$7,-6$
To obtain,

$- {x}^{2} + 7x -6x + 42$
We now factor

$- {x}^{2} + x + 42 \: = x( - x + 7) + 6( - x + 7)$
This implies

$- {x}^{2} + x + 42: = (x + 6)(7 - x)$