X=3 is the answer
1.) add 3 to the other side, so add it to 9
2.) you are then left with 4x=12
3.) solve for x, so divide 12 by 4 and you get 3!
5. 25
6. -16
7. 51
8. -15
For questions 9&10 you will just have to graph it on the graph. Hopefully I helped you tho.
Answer:
The y-intercept is the point (0,2)
see the attached figure
Step-by-step explanation:
we have
we know that
The y-intercept is the value of y when the value of x is equal to zero
so
For x=0
substitute in the equation and solve for y
therefore
The y-intercept is the point (0,2)
using a graphing tool
see the attached figure
Answer:
(3, -1)
Step-by-step explanation:
The easiest way to solve this system of equations is by elimination:
3x + y = 8
2x - y = 7
Add the two equations together:
(3x + 2x) + (y - y) = (8 + 7)
5x = 15
x = 3
Substitute x back into the equation:
2x - y = 7
2(3) - y = 7
6 - y = 7
- y = 1
y = -1
The fourth option, (3, -1)