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Goshia [24]
3 years ago
8

Which are the solutions of the quadratic equation? x2 = 9x + 6

Mathematics
2 answers:
Lelechka [254]3 years ago
8 0
X^2 = 9x + 6
x^2 - 9x - 6 = 0
use quadratic formula : (-b (+-) sqrt b^2 - 4ac) / (2a)
a = 1, b = -9, c = -6
now we sub

x = (-(-9) (+-) sqrt -9^2 - 4(1)(-6)) / 2(1)
x = 9 (+-) sqrt 81 + 24)/2
x = 9 (+-) sqrt 105) / 2
x = 9/2 + 1/2 sqrt 105 or x = 9/2 - 1/2 sqrt 105

mestny [16]3 years ago
4 0

Answer:

Answer is C on edg

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This is all I need because its 55% of my grade on this practice, please help ty.
Dvinal [7]

Answer:

18+2x=42, 2+18x=42, 42-2x=18, 2(x+18)=42, x+42=18+4x

Step-by-step explanation:

First question:

He starts with 18, gains 2 every week, and needs 42. This means the equation is 18+2x=42.

Second question:

He starts with 2, gains 18 every week, and needs 42. This means the equation is 2+18x=42.

Third question:

It starts with 42, loses 2 every day, and needs 18. This means the equation is 42-2x=18.

Fourth question:

Each friend has a total bill of 18+x, there are 2 friends, and they need 42. This means the equation is 2(x+18)=42.

The only answer left is x+42=18+4x, so that's the answer to the fifth problem.

6 0
2 years ago
Give the formula for a function with domain (5, ∞) that has the following properties:
KATRIN_1 [288]

Answer:

The area under the curve y = f(x) at x-axis, on the interval x E (5, ∞) is equal to 7.

Step-by-step explanation:

Solution

Given that:

f(x) = 7√x-5

The function of domain is:

D = x-5 > 0

x>5

so,

x← (5, ∞)

Now,

(1) The sequence root function is always known as positive, i.p defined from x E (5, ∞)

i.p =√x-5

Thus,

7/√x-5 >0

Therefore f(x) = 7/√√x-5 which is a positive integer, which is defined in domain x E (5, ∞).

Each value exist a real and unique values of f(x)

Now,

The function f(x) is continuous and over the interval(5, ∞)

Note: Kindly find an attached copy of part to the solution of this given question below

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3 years ago
HELLO!!! PLEASE HELP?! BRAINLIEST ANSWER INCLUDED! A sample of 130 firecrackers contained 9 duds. How many duds would you expect
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you would expect 99 duds in a box of 1430. 1430 divided by 130 is 11. therefore, multiply the amount of duds in the package of 130 times 11.


Hope this helps!!

5 0
3 years ago
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Galina-37 [17]

Answer:

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Step-by-step explanation:

10 * 40%

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6 0
2 years ago
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Answer:

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