Answer:
you need to give the equation.
Step-by-step explanation:
Answer:
x = 2, y = -3
or
(2, -3)
Step-by-step explanation:
6x + 2y = 6
7x + 3y = 5
multiply the first equation by -3 and the second equation by 2 and solve by elimination
6x + 2y = 6
becomes
-18 - 6y = -18
7x + 3y = 5
becomes
14x + 6y = 10
then, add the new equations.
-18x - 6y = -18
14x + 6y = 10
-4x + 0 = -8
-4x = -8
4x = 8
x = 2
then, substitute x for 2 in one of the eqautions.
6x + 2y = 6
12 + 2y = 6
2y = 6 - 12
2y = -6
y = -3
18.1+17.9+16.8+18.7+15.1 = 86.6
86.6/5 = 17.32
Add all the numbers together then multiply by how many numbers there are :) hope this helps
Step-by-step explanation:
x^3 - 5x^2 - 4x + 20 (I'm assuming this is what you meant)
(1)^3 - 5(1)^2 - 4(1) + 20 = 1 - 5 - 4 + 20 = 12
(-1)^3 - 5(-1)^2 - 4(-1) + 20 = -1 - 5 + 4 + 20 = 18
(2)^3 - 5(2)^2 - 4(2) + 20 = 8 - 20 - 8 + 20 = 0
Now I know (x-2) is a factor of the polynomial.
Synthetic division
2 | 1. -5. -4. 20
| 2. -6. -20
-----------------------------
1. -3. -10. 0
x^2 -3x -10
Factor -> (x-5)(x+2)
So the factors of the original polynomial are (x-5), (x+2), and (x-2)
f(x) = 0 when x = -2,2,or 5