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Tems11 [23]
3 years ago
12

If using the method of completing the square to solve the quadratic equation x^2+15x+21=0, which number would have to be added t

o "complete the square"?
Mathematics
2 answers:
Anit [1.1K]3 years ago
8 0

Step-by-step explanation:

the answer is in the above image

Anna35 [415]3 years ago
3 0

Answer:

my answer is 225/5 sorry comments for wrong

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The coordinates of point D are (7, 4) and the coordinates of point E are (1, -3).
mylen [45]

Answer:

  -6/7

Step-by-step explanation:

The slope of DE is ...

 (change in y)/(change in x) = (y2 -y1)/(x2 -x1) = (-3-4)/(1-7) = -7/-6 = 7/6

The slope of the line perpendicular to DE is the negative reciprocal of this:

  perpendicular slope = -1/slope = -1/(7/6) = -6/7

___

8 0
3 years ago
The vertices of a right triangle are (0, 0), (1, 0), and (0, 1).
Alchen [17]

Answer:

(3,3)

Step-by-step explanation:

Given

Vertices: (0,0)\ (1,0)\ (0,1)

Scale\ Factor = 3

Required

Determine which can't be any of the new vertices

First, we need to determine the new vertices:

New\ Vertex = Scale\ Factor * Old\ Vertex

For (0,0):

New\ Vertex = 3 * (0,0)

New\ Vertex = (3 * 0,3 * 0)

New\ Vertex = (0,0)

For (1,0):

New\ Vertex = 3 * (1,0)

New\ Vertex =  (3 * 1,3 * 0)

New\ Vertex =  (3,0)

For (0,1):

New\ Vertex =  3 * (0,1)

New\ Vertex =  (3 * 0,3 * 1)

New\ Vertex =  (0,3)

<em>Comparing the calculated new vertices to the list of given options; (3,3) can't be any of the new vertices of the new triangle</em>

<em></em>

5 0
3 years ago
What would the distance be of a crater of 4300 feet in diameter use 3.14 pi\
oksano4ka [1.4K]
Answer : 13502 ft
Circumference of crater 2 pi r
Diameter = 4300
Radius = (4300/2)
Distance = 2 × 3.14 × (4300/2)
= 13502 ft


Hope it helped!
4 0
3 years ago
I dont know this one too??
Maslowich

Answer:

bottom left

Step-by-step explanation:

line of symmetry means that both sides will look the same if a line is drawn thru

4 0
2 years ago
LALITETIT<br> IVAL<br> How much does it coast
slega [8]

Answer:

Sorry

Step-by-step explanation:

i dont know

felling sorry

5 0
3 years ago
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