Answer: The required probability is 
Step-by-step explanation:
Since we have given that
Number of people came into Brad's store = 48
Number of them made a purchase = 40
So, the experimental probability that the next person to come into the store will make a purchase would be
Hence, the required probability is
<span> It can be divided by 8 and 6. 8x6=48.</span>
Answer: -42
Step-by-step explanation: 2*2 matrices are easy to find the determinant with. Its just ad-bc, so (5*-2)-(4*8), which is -42
Answer:
the answer is in the explanation
Step-by-step explanation:
For example, two pivot system
1 0 2 X
0 1 3 Y = 0
0 0 0 Z
X + 2z = 0
x = -2z
y + 3z = 0
y = -3z
free variables
z = z
x -2
y = -3
z = 1
(x, y, z) = (-2, -3, 1)
so the option D is correct
since A has 2 pivots
there is 1 free variable
so ax = 0
