A triangle that has an angle that measures 90 degrees would be a Right Triangle.
3x +7x+x+x should be your answer
The average cost in 1990 is <span>$12,841.</span>
I hope this helps la la la
Answer:
<h2>E. 22</h2>
Step-by-step explanation:
<em>Look at the picture</em>.
The lines <em>l</em> and <em>m</em> are parallel, therefore alternate interior angles are congruent.
Therefore 
Supplementary angles add up to 180°.
Therefore
<em>add 16 to both sides</em>
<em>subtract 5x from both sides</em>

We know: the sum of the triangle angle measures is 180°.
Therefore we have the equation:
