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➷ Substitute -3 into g(x)
g(-3) = 2(-3) + 4
Solve:
g(x) = -2
Substitute this value into f(x)
f(-2) = 3(-2)^2
Solve:
f(-2) = 12
The answer is B. 12
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➶ Hope This Helps You!
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You are correct in thinking that the columns of the first matrix must match with the rows of the second matrix.
So for example, we can multiply a 1 x 5 matrix with a 5 x 7 matrix. The two matching '5's are directly what make multiplication possible in this case. For your problem, the first two '3's match and multiplication is possible.
The rows of the first matrix don't need to match with the columns of the second matrix.
Answer:
m = 5
Step-by-step explanation:
.........................
Answer:
x 100/3
Step-by-step explanation:
Hello!
Elimination is where you add or subtract two equations to get rid of a variable
(5x + 5y = -5) + (5x - 5y = 25)
This gives us 10x = 20
Divide 10 from both sides
x = 2
We can put x in to one of the original equations to get y
5(2) + 5y = -5
Combine like terms
10 + 5y = -5
Subtract 10 from both sides
5y = -15
divide both sides by 5
y = -3
The answer to the first one is (2, -3)
For the second one we can subtract the equations
(2x - 3y = 0) - 2x + y = 8
This gives us 4y = 8
Divide by 4 on both sides
y = 2
We can put y into one of the original equations to get x
2x + 2 = 8
subtact 2 from both sides
2x = 6
Divide both sides by 2
x = 3
The answer to the second one is (3,2)
Hope this helps!
