Answer:a
Step-by-step explanation:
a because I just took the test
Answer:
your answer is d. $21.85
5+x=-4, =9
5+x=-4 Write equation
-5 -5 Subtract 5 from both sides to isolate x
+x=-9
2,400 in.³
I Love Maths :)
x=7
y =-1
Given is a system of equations in x and y as
This can be written in matrix form as
Ax = B
Let us find inverse of A
X= A ^(-1) B
x=7, y =-1