I just need somebody to check if my answer is right please List all congruent angles and write a proportion that relates the corresponding sides

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

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Y+ 2/y is it a polynomial in one variable or not? and if so, why?