3 years ago

Identify the sequence as arithmetic, geometric, both, or neither. 7 9 11 13

Mathematics

1 answer:

Lisa [10]3 years ago

6 0

Arithmetic and the sequence is adding 2

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Help me please please please<br> 9/7 x 4/9

Mariulka [41]

The fraction form 4/7 and the decimal form is 0.571428

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2 years ago

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Which are the solutions of x2 = 19x + 1?

Finger [1]

Answer:

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

Step-by-step explanation:

we have

$x^2=19x+1$

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-x^{2}-19x-1=0$

$a=1\\b=-19\\c=-1$

substitute in the formula

$x=\frac{-(-19)\pm\sqrt{-19^{2}-4(1)(-1)}} {2(1)}$

$x=\frac{19\pm\sqrt{365}} {2}$

$x=\frac{19+\sqrt{365}} {2}$

$x=\frac{19-\sqrt{365}} {2}$

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

therefore

StartFraction 19 minus StartRoot 365 EndRoot Over 2 EndFraction comma StartFraction 19 + StartRoot 365 EndRoot Over 2 EndFraction

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3 years ago

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Simplify 2 + 3/5x - 1 - 1/5x

tankabanditka [31]

The answer would be c. because 2-1= 1 and 3/5x - 1/5x= 2/5x. All adding up to 1+2/5x.

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3 years ago

Please help

ikadub [295]

Answer:

Quadratic

Step-by-step explanation:

Linear has a constant growth and exponential cannot be negative.

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PSYCHO15rus [73]

Answer:

You are a ray of sunshine is a metaphor because a simile has to have like or as in it.

Step-by-step explanation:

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