The solution of the system 4x+5y=2 and 6x-2y=b is (3,a). find the values of a and b.

What is the number 321,000,000 in scientific notation? also what is the number? ?

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap