Answer:
loser
Step-by-step explanation:
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Answer:
12+ -2=10?
Step-by-step explanation:
12+-2=10
now add the first number to twice the second number and get 8
12+-2+-2=8
dont know about the other one though
Good Luck!
Answer:
12
Step-by-step explanation:
f(x) = 7(x – 2) + 4(x + 1)
Let x =2
f(2) = 7(2 – 2) + 4(2 + 1)
=7(0) +4(3)
= 0+12
= 12
Answer:
0.105 or 21/200
Step-by-step explanation:
2/8= 0.375 cups
0.375x0.72= 0.27 cups or 27/100
0.375-0.27= 0.105
Answer:
The correct option is (A)
A. Replace row 4 by its sum with - 4 times row 3.
w = 8
x = 17/2
y = 6
z = -5
Step-by-step explanation:
The given matrix is
To solve this matrix we need to create a zero at the 4th row and 3rd column which is 4 at the moment.
Multiply 3rd row by -4 and add it to the 4th row.
Mathematically,
So the correct option is (A)
A. Replace row 4 by its sum with - 4 times row 3.
So the matrix becomes,
Now the matrix may be solved by back substitution method.
Bonus:
The solution is given by
Eq. 1
-3z = 15
z = -15/3
z = -5
Eq. 2
y + 2z = -4
y + 2(-5) = -4
y - 10 = -4
y = -4 + 10
y = 6
Eq. 3
2x - 6y + 0z = 5
2x - 6(6) = 5
2x - 12 = 5
2x = 12 + 5
2x = 17
x = 17/2
Eq. 4
w - 4x + 4y + 0z = -2
w - 4(17/2) + 4(6) = -2
w - 34 + 24 = -2
w - 10 = -2
w = -2 + 10
w = 8