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Sergio [31]
4 years ago
8

Solve x^2-8x-9=0 algebrically

Mathematics
1 answer:
SVETLANKA909090 [29]4 years ago
7 0

Answer:

X = 9, -1

Step-by-step explanation:

1, Factor it

(x-9) (x+1) = 0

2. Both of a factor will = 0

x-9 = 0

x+1=0

3. Solve

x=9

x=1

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Dahasolnce [82]
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6 0
2 years ago
Make sure your answer is in
romanna [79]

Answer:

210° , 330°

Step-by-step explanation:

using the sides of the 30- 60- 90 triangle

with legs 1, \sqrt{3} and hypotenuse 2 , then

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since sin^{-1} - \frac{1}{2}

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180° + 30° = 210° ← in third quadrant

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6 0
2 years ago
Please help! Will mark brainiest!!!!
brilliants [131]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
What is the answer to the problem i am very confused...
musickatia [10]
The time of takeoff of this hovercraft would be 0 seconds, as if you were starting a timer. So, if you plug in 0 for x (unit for seconds) in your equation, it will look like this:

h(0) = -3(0 - 3)² + 108
Parenthesis first
h(0) = -3(-3)² + 108
Exponents next
h(0) = -3(9) + 108
Multiplication
h(0) = -27 + 108
Combine like terms

h(0) = 81: The height of the hovercraft at the time of takeoff is 81 meters!
Hope this helps :)

7 0
3 years ago
Solve this 7th grade math problem: 9= h/9
Naddik [55]

Answer:

H=81

Step-by-step explanation:

If 9=h/9 you multiply both sides by 9 to get h by itself, and end up with h=81.

6 0
3 years ago
Read 2 more answers
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