41º
1) Since we want to find the reference angle for a -139º angle, we need to resort to the following formula
2) Note that a -139 angle is in quadrant III, since negative angles are clockwise oriented
3) Thus the Reference Angle is 41º
There are 10 m of thread on the reel. She use 210 cm. In centimeters. How much is left on the reel
2 answers:
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Answer:
and
Step-by-step explanation:
Given:
The rational equation to solve is given as:
We use the cross multiplication rule and multiply the numerators one side with the denominators of the other side. Therefore,
Now, for , the rational equation is equal to 0. So,
is a solution.
Also, is also a solution as the equation's denominator is defined at that point.
So, no extraneous solution.