Solve the system by elimination. − 2 x + 2 y + 3 z = 0 − 2 x − y + z = − 3 2 x + 3 y + 3 z = 5

Step-by-step explanation:

we have

----> equation A

 -----> equation B

----> equation C  

adds equation A and equation C

-----> equation D

adds equation B and equation C

-----> equation E

we have the system

-----> equation D

-----> equation E

Multiply equation E by -1.5 both sides

-----> equation F

adds equation D and equation F

Find the value of z

substitute the value of y in equation E (or substitute in equation D)

Find the value of x

substitute the value of y and z in equation A (or equation B or C)

therefore

The solution of the system of equations is

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.