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Troyanec [42]
3 years ago
10

Factorise: X(squared)-9

Mathematics
2 answers:
Gwar [14]3 years ago
7 0

(x+3)(x-3)

−

3

)

(

x

+

3

)

Explanation:

x

2

−

9

is a

difference of squares

and in general

horsena [70]3 years ago
5 0

see this photo answer plz

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PLEASE HELP URGENT :))))
harkovskaia [24]

Answer:

  P = (3, 3 2/7)

Step-by-step explanation:

The desired point P is the weighted average of the end point values. The weights are the numbers in the ratio of segment lengths. The smallest weight is used for the end point closest to the largest division.

  P = (5N +2M)/(5+2) = (5(7, 7) +2(-7, -6))/7 = (35-14, 35-12)/7

.   P = (21, 23)/7

  P = (3, 3 2/7)

_____

The x-distance from M to N is 7-(-7) = 14 units. The x-distance from P to M must be 5/(5+2) = 5/7 of that, so is (5/7)14 = 10 units. So, the x-coordinate of P is ...

  Mx +10 = Px

  -7 +10 = 3 . . . . x-coordinate of P

The corresponding y-coordinate can be found from a graph or by a similar calculation.

  My +5/7(Ny -My) = Py

  Py = -6 +(5/7)(7-(-6)) = -6 +65/7 = -6 +9 2/7 = 3 2/7 . . . . y-coordinate of P

6 0
4 years ago
Diagram shows an irregular hexagon PQRSTU.Fine the value of X + Y=
Lynna [10]
To find the value of x+y, we will first find the sum of all the interior angles of the hexagon.The sum of the interior angles in a hexagon is always equal to 720 degrees.

All the angles in the diagram are in terms of x or y except for angle t. However, we know that the corresponding exterior angle is 30 degrees. The sum of angle t and 30 is 360. We can solve this in an algebraic equation.

t+30=360
Subtract 30 from both sides
t = 330

Now, we can solve for the values of x+y. We can set this up in another algebraic equation.

x+x+x+2y+y+30=720

Combine like terms:
3x+3y+30 = 720

Subtract 30 from both sides:
3x+3y = 690

Divide both sides by 3:
\frac{3x + 3y}{3} =  \frac{690}{3}
x+y = 230

The sum of x and y is 230.
6 0
4 years ago
Answer in the attachment! Please no bitly links
alekssr [168]

Answer:

 I'm just going to assume inbetween 4 and 2 is a multiplication symbol. If it isn't, just comment under and I'll tell u the answer.  

hope this is right :D

7 0
3 years ago
Solve the system of equations by graphing. x+y=-9 4x+y=-19
shutvik [7]

For this case we have the following system of equations:

x + y = -9\\4x + y = -19

We multiply the first equation by -4:

-4x-4y = 36

We have the following equivalent system of equations:

-4x-4y = 36\\4x + y = -19

We add the equations:

-4x + 4x-4y + y = 36-19\\-3y = 17\\y = - \frac {17} {3}

We find the value of the variable "x":

x = -9-yx = -9 - (- \frac {17} {3})\\x = -9 + \frac {17} {3}\\x = \frac {-27 + 17} {3}\\x = - \frac {10} {3}

Thus, the solution of the system is:

(x, y): (- \frac {10} {3}, - \frac {17} {3})

See the graphic in the attached image

ANswer:

(x, y): (- \frac {10} {3}, - \frac {17} {3})

See the graphic in the attached image

4 0
4 years ago
1 tablet has 500mg how many mg does 3 tablets have
dem82 [27]
If I tablet has 500mg, then to find out how many mg 3 tablets have, you simply multiply 500 by 3.
Final answer is 1500 mg
5 0
3 years ago
Read 2 more answers
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