Answer:
B) equilateral...............
The equation of the first line can be written in point-slope form as
.. y = 3(x +1) -8
or
.. 3x -y = 5
The equation of the second line can be written in 2-point form as
.. y = (-1-3)/(10-(-6))*(x +6) +3
.. y = (-1/4)(x +6) +3
or
.. x +4y = 6
A graph shows the solution to this system is (x, y) = (2, 1).
_____
The second equation can be used to write an expression for x:
.. x = 6 -4y
This can be substituted into the first equation.
.. 3(6 -4y) -y = 5
.. 18 -13y = 5 . . . . . . . collect terms
.. 13 = 13y . . . . . . . . . add 13y-5
.. 1 = y . . . . . . . . . . . . divide by 13
From the above equation for x
.. x = 6 -4*1 = 2
First, you had to switch sides of equation.
And it gave us ⇒ 
Then multiply by five from both sides of equation form.
And it gave us ⇒ 
Simplify.
And it gave us ⇒ 
Next, divide by two from both sides of equation form.
And it gave us ⇒ 
Finally, simplify.
And it gave us ⇒ 
Final answer: ⇒ 
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie
Answer:
False
Step-by-step explanation:
A variable expression can contain numbers (that work alongside the variables) and operations (that describe how the numbers and variables interact)