Can someone just tell me the answers to this problem cause i am stuck and my grandmother can't even firgure it out

15 point ! ~ see if you know the answer to both you!

Use the elimination method to solve the systems of equations. choose the correct ordered pair. 7x+4y=39

9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?