Solve the simultaneous linear equations by using the elimination method
1 answer:
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Answer:
20°
Step-by-step explanation:
40°, 70° and 90° are the measures of the three angles of the quadrilateral.
Measure of fourth angle of the Quadrilateral
= 360° - (40° + 70° + 90°)
= 360° - 200°
= 160°
Measure of angle 1 will be equal to the measure of the linear pair angle of 160° as they are corresponding angles.
Thus,
Alternate method:
Answer: Solution in photo
To solve this, set up the equation, 90% of x being .9*x=57. Then, solve for x, x=57/.9=
=6.333