What is answer to x+10=-13  what does x equal

Answers

Answer 1
Answer: x + 10 = -13
-13 - 10 = x
-23 = x

CHECK

-23 + 10 = -13
-13 = -13!
Answer 2
Answer: x + 10 = -13 (original problem)
   -10      -10 (subtract 10 from each side)
The 10 - 10 equals 0 so it cancels out of the problem.
x = -23  <- (-13 - 10 = -23)

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(S^2 +r^2)^2


Please show me how you got the answer.

Answers

(s^2+r^2)^2=s^4+2r^2s^2+r^4\n\n(a+b)=a^2+2ab+b^2

How would i solve 4x-3y=8
5x-2y=-11

using the elimination method?
i'm in algebra 1 and we had a sub the day we were doing this and he was terrible explaining the situations on the worksheet. please explain

Answers

To use the elimination method, the coefficient of one variable in one equation must be the opposite number of the coefficient of the same variable in the second equation.

4x-3y=8 \n5x-2y=-11

Here you can multiply the first equation by 2, and the second equation by -3.

4x-3y=8 \ \ |\cdot 2 \n5x-2y=-11 \ \ |\cdot (-3) \n \n8x-6y=16 \n-15x+6y=33

Now you just add the equations by sides and solve for one variable.

8x-6y=16 \n \underline{-15x+6y=33 } \n8x-6y-15x+6y=16+33 \n8x-15x=16+33 \n-7x=49 \nx=-7

Now you solve for the other variable by substituting -7 for x in one of the equations.

4x-3y=8 \n4 \cdot (-7)-3y=8 \n-28-3y=8 \n-3y=8+28 \n-3y=36 \ny=-12

You could choose x at the beginning as well. Then you'd have:
4x-3y=8 \ \ |\cdot (-5)\n5x-2y=-11 \ \ |\cdot 4 \n \n-20x+15y=-40 \n\underline{20x-8y=-44 \ \ \ \ \ \ } \n-20x+15y+20x-8y=-40-44 \n15y-8y=-40-44 \n7y=-84 \ny=-12 \n \n4x-3y=8 \n4x-3 \cdot (-12)=8 \n4x+36=8 \n4x=8-36 \n4x=-28 \nx=-7

So the answer is:
x=-7 \n y=-12

Answer:

x=-7 and y=-12

Step-by-step explanation:

Solutions for 12 – x2 = 0?

Answers

Answer:   x =  ±  2 √3 ;  or,  write as:   x  =   ± 3.464  .
__________________________________________________
Given:  12 – x² = 0 ; 

Multiply BOTH side by "-1" ;
__________________________________________________
-1 (12 – x² = 0) ;

to get:

-12 + x² = 0 ;

Rewrite as:

x²  - 12 = 0 ;

Add "12" to both sides; to get: 

x² = 12 

Take the square root of each side:

√(x²) = ±√(12)

x = ± √(12) 
_________________________________________________
√(12) = √(4) * √(3) = 2 √(3)

√(12) = 3.4641016151377546 ; round to:  3.464 .
____________________________________________________
x = ± √(12) ;
____________________________________________________
x =  ±  2 √3 ; or, write as:  x =  ± 3.464 .
____________________________________________________

Please help me, I will mark brainliest answer!! A zebra eats 28 pounds of grass in a day. How many pounds of grass would 14 zebras eat in a day?

Answers

I would say the answer is 392
just multiply 28 by 14 which gives you 392

Jane arranges m chairs in each of n rows to seat x people.The formula to find the number of chairs in each row is m =
_____________________
If 60 people attend the meeting and each row has 4 chairs, there are _______________________________________
rows.

Answers

The formula to find the number of chairs in each row is m = x ÷ n,
where
m - the number of chairs,
n - the number of rows,
x - the number of people.

If 60 people attend the meeting and each row has 4 chairs, there are 15 rows.
This is assumed using the above formula:
m = x ÷ n

If:
x = 60
m = 4

Then:
4 = 60 ÷ n
⇒ n = 60 ÷ 4
⇒ n = 15

Evaluate the expression, using the given value of the variable.4 – 2x + 5x when x = 4

A.
–24

B.
–18

C.
16

D.
28

Answers

= 4 -(2)(4) + (5)(4) \n =4 - 8 + 20  \n = 16x = 16
4-2x+5x \n 4-2(4)+5(4) \n 4-8+20 \n -4+20 \n =16  \n  A.16