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Musya8 [376]
3 years ago
7

PLEASE HELP ASAP ANY AND ALL ANSWERS ARE APRECIATED

Mathematics
2 answers:
Alinara [238K]3 years ago
7 0
Answer to #1 is B. y= -x^2 + 2
Answer to #3 is B & D.
Answer to #4 is also B & D
Answer to #5 is x^2 -7x +5
Answer to #6 is -21x^2 -12xy +30x
Answer to #7 is C. 2x^2 -3x -5
Answer to #8 is 20x^2 -43x +21
Answer to #9 is -6x^2 -26x +60
Kipish [7]3 years ago
4 0

Answer:

I dont know

Step-by-step explanation:

multiple and simply the equation

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Point B has coordinates ​(​1,2​). The​ x-coordinate of point A is -8. The distance between point A and point B is 15 units. What
Xelga [282]

Answer:

The possible coordinates of point A are A_{1} (x,y) = (-8, 14) and A_{2} (x,y) = (-8, -10), respectively.

Step-by-step explanation:

From Analytical Geometry, we have the Equation of the Distance of a Line Segment between two points:

l_{AB} = \sqrt{(x_{B}-x_{A})^{2} + (y_{B}-y_{A})^{2}} (1)

Where:

l_{AB} - Length of the line segment AB.

x_{A}, x_{B} - x-coordinates of points A and B.

y_{A}, y_{B} - y-coordinates of points A and B.

If we know that l_{AB} = 15, x_{A} = -8, x_{B} = 1 and y_{B} = 2, then the possible coordinates of point A is:

\sqrt{(1+8)^{2}+(2-y_{A})^{2}} = 15

81 + (2-y_{A})^{2} = 225

(2-y_{A})^{2} = 144

2-y_{A} = \pm 12

There are two possible solutions:

1) 2-y_{A} = -12

y_{A} = 14

2) 2 - y_{A} = 12

y_{A} = -10

The possible coordinates of point A are A_{1} (x,y) = (-8, 14) and A_{2} (x,y) = (-8, -10), respectively.

8 0
3 years ago
Math help max points all questions also brainess <br> plz dont just take them i really need help
Aleks [24]

Answer:

Step-by-step explanation:

7 0
3 years ago
A members-only speaker series allows people to join for $21 and then pay $2 for every event attended. What is the maximum number
pashok25 [27]
2 because if you add 4 dollars to it is is 25$ and that is equal it 2 events
8 0
3 years ago
Read 2 more answers
. Andrew made an error in determining the polynomial equation of smallest degree whose roots are 3, 2+2i
KIM [24]

Answer:

Error of Andrew: Made incorrect factors from the roots

Step-by-step explanation:

Roots of the polynomial are: 3, 2 + 2i, 2 - 2i. According to the factor theorem, if a is a root of the polynomial P(x), then (x - a) is  a factor of P(x). According to this definition:

(x - 3) , (x - (2 + 2i)) , (x - (2 - 2i)) are factors of the required polynomial.

Simplifying the brackets, we get:

(x - 3), (x - 2 - 2i), (x - 2 + 2i) are factors of the required polynomial.

This is the step where Andrew made the error. The factors will always be of the form (x - a) , not (x + a). Andrew wrote the complex factors in form of (x + a)  which resulted in the wrong answer.

So, the polynomial would be:

(x - 3)(x - 2 - 2i)(x - 2+2i)=0\\\\ (x-3)(x^{2}-2x+2xi-2x+4-4i-2xi+4i-4i^{2})=0\\\\ (x-3)(x^{2}-4x+4+4)=0\\\\ (x-3)(x^{2}-4x+8)=0\\\\ x^{3}-4x^{2}+8x-3x^{2}+12x-24=0\\\\ x^{3}-7x^{2}+20x-24=0

7 0
3 years ago
If the circumference is 4.6pi what is the area​
Keith_Richards [23]

Answer:

The area of a circle with a circumference of 4.6 is 1.684

Step-by-step explanation:

I think its that. Im not sure ;-;

6 0
3 years ago
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