Help please I’m so confused!
2 answers:
Three Ways how to solve- by graphing or using process of elimiation or process of :substitution
Line 1: 3x -y =6
Line 2: 4x +4y = -8
Substitution Method:
y = 3x - 6 (make line 1 equal to x)
then plug it as y into line 2 formula
4x + 4(3x - 6) = -8
Now solve
4x + 12x -24 = -8
16x = 16
x = 1
Elimination Method:
3x -y =6 (multiply the top by 4 to get rid of y )
4x +4y = -8
So, it changes to ...
12x - 4y = 24
4x +4y = -8
then add
16x = 16
x = 1
Graphing:
Plot both equations, then find the point where they intercept and find the x value and that should be your answer
The graph is attached.
x = 1
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Option C: is the surface area of the rectangular prism
Explanation:
The height of the rectangular prism is 5 cm
The width of the rectangular prism is 10 cm
The depth of the rectangular prism is 4 cm
We need to determine the surface area of the rectangular prism.
The surface area of the rectangular prism can be determined using the formula,
Substituting ,
and
in the formula, we get,
Multiplying the terms within the bracket, we have,
Adding all the values within the bracket, we get,
Multiplying, we have,
Thus, the surface area of the rectangular prism is
Hence, Option C is the correct answer.