Which pair of angles has congruent values for the sin x and the cos y?

a- 70degrees , 160 degrees
b-70 degrees, 70 degrees
c- 70 degrees, 120 degrees
d- 70 degrees, 20 degrees

Me write an equation for the interior angles of this triangle that uses the triangle sum theorem

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Rob filled 5 fewer plastic boxes with football cards than basketball cards. he filled 11 boxes with basketball cards.