Line a and b are parallel. based on the figure match each given angle with its congruent angles.

tiles.
angles congruent to 1
angles congruent to 2
angles congruent to 7
angles congruent to 6

3,7,6=?
3,7,2=?
4,8,5=?
3,6,2=?

The sum of two numbers is 86, and their difference is 20. find the two numbers

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares