So uh- here we are again
2 answers:
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There are several ways to solve a system of equation; one of these ways is the use of matrix.
<em>Jerry made a mistake at step 2</em>
From the attachment, the step 1 is represented as:
The equation in step 2 is given as:
This means that:
We subtract the elements of row 2 from the elements of row 1, multiplied by 5
So, we have:
Expand
Subtract corresponding cells
So, the new row 2 elements should be:
However, the row 2 elements of Jerry's steps are:
This means that:
Jerry made a mistake; and the mistake is at step 2
Read more about matrix at:
Answer:
<h2>107 and 73</h2><h2 />Step-by-step explanation:
supplementary angle
7x + 9 + 5x + 3 = 180
12x = 180 - 3 - 9
x = 168 / 12
x = 14
plugin x=14 into the equation
= 7x + 9
= 7(14) + 9
= 107°
plugin x=14 into the equation
= 5x + 3
= 5(14) + 3
= 73°
