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ASHA 777 [7]
3 years ago
9

HELP!! 100 POINTS!!

Mathematics
2 answers:
NNADVOKAT [17]3 years ago
5 0

Answer:

x=9 x=-1

Step-by-step explanation:

x²-8x-9=0    a=1 b=-8 c=-9

you have to use the quadratic formula to get the values.

Sladkaya [172]3 years ago
3 0

Answer:

It's incorrect

x = -1, 9

Step-by-step explanation:

x²-8x-9=0

x²-8x=9

x²-8x+16=9+16

(x-4)²=25

You have to take square root both sides, so RHS would be sqrt(25) = 5 (+/-)

x-4=+/-5

x-4=5

x-4=-5

x=9

x=-1

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Answer:

The balance is \$11,505.34  

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

A=P(1+\frac{r}{n})^{nt}  

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A is the Final Investment Value  

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in this problem we have  

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substitute in the formula above  

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3 years ago
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SOVA2 [1]

Answer:

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Step-by-step explanation:

Collins' cube has a volume of that is the length of any side, x, cubed:  Vol = x^3.  Since his box has 8^3, we can say that x = 2.  <u>[2^3 = 8]</u>

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