What multiplies to 16 and adds to negative 12

Answers

Answer 1

Answer: factor 16 and see the - factor pairs and add them, see which add to -12
-1-16=-17 nope
-2-8=-10 nope
-4-4=-8
hmm

we will solve with math
xy=16
x+y=-12
minus x both sides
y=-12-x
sub for y in other equation
x(-12-x)=16
-12x-x^2=16
add 12x+x^2 both sides
0=x^2+12x+16
use quadratic formula
if you have
ax^2+bx+c=0
x= $\frac{-b+/- \sqrt{b^(2)-4ac} }{2a}$

0=x^2+12x+16
a=1
b=12
c=16

x= $\frac{-12+/- \sqrt{12^(2)-4(1)(16) }}{2(1)}$
x= $(-12+/- √(144-64 ))/(2)$
x= $(-12+/- √(80))/(2)$
x= $(-12+/- 4√(5))/(2)$
x= $\frac{-6+/- 2√(5)$
x= $\frac{-6+ 2√(5)$ or $\frac{-6- 2√(5)$

aprox
x=-1.52786 or -10.4721

those are the numbers

the numbes are -1.52786 or -10.4721

Answer 2

Answer: 8 times 2 8 because they are both equability right

Related Questions

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Please answer it in two minutes
Please help, will give brainliest answer

Kendra hasn’t missed a day of school in 245 days. This is twenty days less than five times the number of days it has been since Brandon has missed a day of school. How many days has it been since Brandon missed a day of school?

Answers

The equation would be 5x+20=245
X=the number of days Brandon missed.
Subtract 20 from both sides; 5x=225
Then divide by 5; x=45
It has been 45 days since Brandon missed school.

Answer:

The answer is 53

245 = 5y - 20 | y = 53

Step-by-step explanation:

subtracting 20 ( - 20) represents "twenty days less"

5y represents "five times the number of days"

This is all being compared to Kendra's 245 days of perfect attendance which is why it's "245 ="

Plug it in! & don't forget PEMDAS ----> 5(53) - 20 = 245

What rotation is shown below?A.-90° around the origin
B.270° around the origin
C.90° around the origin
D.180° around the origin

Answers

C. 90° around the origin

Help on a question geometry

Answers

2log 3 = log 3^2 = log 9 ;
log 5 + 2log 3 = log 5 + log 9 = log( 5 * 9 ) = log 45 ;
log ( x - 12 ) = log 45;
x - 12 = 45 ;
x = 12 + 45 ;
x = 57 ;
But, x - 12 > 0;
And, 57 - 12 > 0 ;
The solution is 57 .

$D:x-12>0\nD:x>12\n\log_3(x-12)=\log_35+2\log_33\n\log_3(x-12)=\log_35+\log_33^2\n\log_3(x-12)=\log_35+\log_39\n\log_3(x-12)=\log_3(9\cdot5)\n\log_3(x-12)=\log_345\nx-12=45\n\boxed{x=57}$

Write about how to use the dollar sign and decimal point to show the total value of 5 quarters?

Answers

Answer:

5 quarters = $1.25

Step-by-step explanation:

We are required,

To write 5 quarters using dollar sign and decimal point.

Since, we know,

1 quarter = 0.25 dollar

So, we get,

5 quarters = 0.25 × 5 = 1.35 dollars

Thus, we have that,

5 quarters in terms of dollars and decimal point is $1.25.

That is, 5 quarters = $1.25

1 quarter is 0.25
0.25×5=1.25
5 quarters is equal to $1.25

Carey already owns 2 necklaces, and additional necklaces are priced at 2 for a dollar. With $2 to spend on new necklaces, how many total necklaces can Carey own? Write and solve an equation to find the answer.

Answers

2x=2. Solving this, you get x=1. You then add 2 to 1 because she already has 2 necklaces to get that she can have a total of 3 necklaces.

Answer:

Step-by-step explanation:

2x=2. Solving this, you get x=1. You then add 2 to 1 because she already has 2 necklaces to get that she can have a total of 3 necklaces.

Solve for x. 3(3x - 1) + 2(3 - x) = 0

Answers

The equation given in the question is
3(3x - 1) + 2(3 - x) = 0
9x - 3 + 6 - 3x = 0
6x + 3 = 0
6x = - 3
x = - (3/6)
= - (1/2)
So the value of x as has been determined above is -1/2. I hope the procedure is clear enough for you to understand.You canalways use this method for solving problems that are similar in type withoutrequiring any help from outside.

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Order from least to greatest: -0.8, 2/5, 0.825, -3/5