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Alenkinab [10]
3 years ago
11

Multiplies to -2 adds to 6

Mathematics
1 answer:
ikadub [295]3 years ago
6 0
Xy=-2
x+y=6

minnus x from second equation
y=6-x
sub for y
x(6-x)=-2
6x-x^2=-2
add x^2 both sides and minus 6x both sides
0=x^2-6x-2
use quadatic formula

if you have
ax^2+bx+c=0
x=\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}


x^2-6x-2=0
a=1
b=-6
c=-2
x=\frac{-(-6)+/- \sqrt{(-6)^{2}-4(1)(-2)} }{2(1)}
x=\frac{6+/- \sqrt{36+8} }{2}
x=\frac{6+/- \sqrt{44} }{2}
x=\frac{6+/- 2\sqrt{11} }{2}
x=3+/- \sqrt{11}

x=3+ \sqrt{11} or x=3- \sqrt{11}
aprox
x=6.31662 or -0.316625

those are the numbers

6.31662 and -0.316625


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ExtremeBDS [4]

Answer:

1,257 km

Step-by-step explanation:

The path of one satellite has the equation

x^2 + y^2 = 56,250,000\\ \\x^2+y^2=7,500^2

This is the equation of the circle with the center at the origin (Eartg) and the radius of 7,500 km.

The orbit of the other satellite is 200 km farther from the centre of Earth, so the radius of this orbit is 7,700 km.

Find the distances travelled by two satellites:

1st satellite:

D_1=2\pi r_1=2\pi \cdot 7,500=15,000\pi \ km

2nd satellite:

D_2=2\pi r_2=2\pi \cdot 7,700=15,400\pi \ km

Difference:

D_2-D_1=15,400\pi -15,000\pi =400\pi \approx 1,257\ km

6 0
4 years ago
69= 7x + 5x + 9. Please help. I need this done by 12/4/2020
astraxan [27]
X=5 if you are to substitute 5 for the x’a you should get 69
6 0
3 years ago
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Which of the following shows the factors of 5x2 + 17x + 6? A. (5x + 1)(x + 6) B. (5x + 2)(x + 3) C. (5x + 3)(x + 2) D. (5x + 6)(
zysi [14]

Answer:

B. (x+3)(5x+2)

Step-by-step explanation:

The given quadratic trinomial is;

5x^2+17x+6

Comparing this to ax^2+bx+c, we have a=5,b=17,c=6.

ac=5\times6=30

Two factors of 30 that add up to 17 is 15  and 2.

We split the middle term to obtain;

5x^2+15x+2x+6

We factor by grouping;

5x(x+3)+2(x+3)

Factor further

(x+3)(5x+2)

The correct answer is B.

5 0
4 years ago
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A candle burns down at the rate of 0.5 inches per hour. The original height of the candle was 6 inches.
olasank [31]

Answer:

See below.

Step-by-step explanation:

"Part A:

(1,5.5)

(2,5)

(3,4.5)

(4,4)

(5,3.5)

(6,3)

Every hour (x value) I subtracted 0.5 from the candle height (y value) since it burns at 0.5 inches per hour.

Part B:

Yes, this is a function because there is a constant relationship between the input and the output.

Part C:

Yes, this will continue to be a function because there is still a constant relationship, even though its different than the first one.

(1,5.7)

(2,5.4)

(3,5.1) ect."

Answer is also here:

brainly.com/question/2872549?referrer=searchResults

-hope it helps

6 0
3 years ago
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pickupchik [31]
Since a is supplementary to b, their sum is 180*.
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