Answer:
30
Step-by-step explanation:
Answer:
-2x^3+x^2+5x-5
Step-by-step explanation:
f(x) = 4 - 2x – 2x^3
g(x) = x² + 7x-9
f(x) + g(x)=4 - 2x – 2x^3+ x² + 7x-9
Combine like terms
f(x) + g(x) = -2x^3+x^2+5x-5
Answer:
2
Step-by-step explanation:
In general,
.
So we have here that:
![437=21^2-x^2](https://tex.z-dn.net/?f=437%3D21%5E2-x%5E2)
![437=441-x^2](https://tex.z-dn.net/?f=437%3D441-x%5E2)
We went
by itself first.
Subtract 441 on both sides:
![437-441=-x^2](https://tex.z-dn.net/?f=437-441%3D-x%5E2)
![-4=-x^2](https://tex.z-dn.net/?f=-4%3D-x%5E2)
Multiply both sides by -1:
![4=x^2](https://tex.z-dn.net/?f=4%3Dx%5E2)
Take the square root of boht sides:
![\pm \sqrt{4}=x](https://tex.z-dn.net/?f=%5Cpm%20%5Csqrt%7B4%7D%3Dx)
![\pm 2=x](https://tex.z-dn.net/?f=%5Cpm%202%3Dx)
So both 2 and -2 would satisfy the equation.
Only one of these is a whole number.
The whole numbers consist of the elements that you can count with and 0.
The whole number set is {0,1,2,3,4,5,6,7,...}
So 2 is the answer.
Check:
Replace x with 2:
437=(21+2)(21-2)
437=(23)(19)
437=437 is a true equation so 2 is definitely a solution.
Answer:
tor maytafahsjsjbshwgdhxhxhqjx
3) 50/5 = 10
Answer = 10
4) 18/2 = 9
9x3 = 27
Answer = 27
5) 24/4 = 6
9x6= 54
54/2 = 27
Answer = 27
6) 16/4 = 4
12x4 = 48
48/2 = 24
7) 15/5 = 3
3x3=9
2x + 1 = 9
2x = 8
X = 4
Answer = 4
8)45/3 = 15
2x + 1 = 15
2x = 14
x = 7
Answer = 7