What two numbers add to equal -12 and multiply to equal -28?

Answers

Answer 1

Answer: One thing before we start :)

AS you can see both numbers after equation have to be negative,
also we know that 2 same numbers have to add up to -12 and those 2 number after multiplication have to be equal -28

Some theory:

We know that any number which is not negative multiplied by negative will result in negative result, to make it more clear

$(+)*(-)=(-)$

but

$(-)*(-)=(+)$

we have 2 unknown numbers, let's say it's $x$ and $y$

$x+y=-12$
$x*y=-28$

for $x=2$
for $y=-14$

$2+(-14)=2-14=-12$
$(2)*(-14)=-28$

So your answer is 2 and -14 ;)

Answer:

m = -0.25

Step-by-step explanation:

First coordinate : (-4, 3)

Second coordinate : (0, 2)

x1 = -4

x2 = 0

y1 = 3

y2 = 2

To find a slope, we can use this formula :

$m = (y2 - y1)/(x2 - x1) \nm = (2 - 3)/(0 - (-4)) \nm = (-1)/(4)\nm = -0.25$

So in conclusion, the slope of the line is -0.25

Sharon pours salt into a glass of water. The salt dissolves. The substance in the glass is a(n) __________.

Answers

Answer:

Issa Mixture.

Step-by-step explanation:

A salt is a compound. ... Na exists in sodium compounds and Cl as Cl2 or chlorinated compounds. A common example would be table salt where both exist( Sodium Chloride). Sodium Chloride solution consisting of NaCl and water is a mixture. An example would be sea water which consists of several salts. Ur welcome.

The salt is the solute; water is the solvent. Mixed together they become a solution.

The total surface area of a cube is 726 in^2 what is the length of each side of the cube? it is. in

Answers

the area of one face = 726/6 = 121 in^2

so each edge = sqrt 121 = 11 inches

Solve, using the substitution method.4x + 2y = 11
x – 2 = – 2y

A.

B.

C.

D.

Answers

$4x+2y=11 \nx-2=-2y \n \n\hbox{from the 2nd equation:} \nx-2=-2y \nx=-2y+2 \n \n\hbox{substitute -2y+2 for x in the 1st equation:} \n4(-2y+2)+2y=11 \n-8y+8+2y=11 \n-8y+2y=11-8 \n-6y=3 \ny=-(3)/(6)=-(1)/(2) \n \n\hbox{solve one of the equations for x:} \nx=-2 \cdot (-(1)/(2)) +2=1+2=3 \n \n \hbox{the answer:} \n x=3 \n y=-(1)/(2)$

4x + 2y = 11
x - 2 = -2y
First you have to get a variable alone in one of the equations.

x - 2 = -2y
+2 +2
--------------
x = -2y + 2
Next you substitute -2y +2 for x in the second equation.

4(-2y + 2) + 2y = 11
Distribute.

-8y + 8 + 2y = 11
Combine like terms.

-6y + 8 = 11
Get the variable (y) by itself.

-6y + 8 = 11
-8 -8
--------------------
-6y = 3
Finally get y by itself.

-6y = 3
----- ------
-6 -6

Y = 0.5

Now to get x you plugin the answer for y.

x - 2 = -2y
x - 2 = -2(0.5)
x - 2 = -1
+2 +2
x = 1

(1, 0.5) Is your ordered pair. :D

Which shows the factored form of x2 – 12x – 45?(x + 3)(x – 15)
(x – 3)(x – 15)
(x + 3)(x + 15)
(x – 3)(x + 15)

Answers

Hi!

(x+a)·(x+b) = x²+xa+xb+ab = x²-12x-45

x² = x²
xa+xb = (a+b)x = -12x ⇒ (a+b) = -12
ab = -45

When (a+b) = -12 and ab = -45?

+3-15 = -12 and (+3)(-15) = -45
-3-15 = -18 and (-3)(-15) = +45
+3+15 = +18 and (+3)(+15) = +45
-3+15 = +12 and (-3+15) = -45

Answer:

(x+3)(x-15)

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What two numbers add to equal -12 and multiply to equal -28?

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