What is the measure of the missing angle?

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual 

How can writing phrases as algebraic expressions you solve problems?