Which algebraic expressions are polynomials? check all that apply.

pi x minus startroot 3 endroot + 5 y
x2y 2 – 4x3 + 12y
startfraction 4 over x endfraction – x2
– 16
3.9x3 – 4.1x2 + 7.3

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

Select the correct answer from each drop-down menu. let c(g) be the total cost, including shoe rental, for bowling g games at pin town lanes. c(g) = 5g+3 so, c(6) = 8? 33? 30? or 14? this means that for a $6 shoe rental? for $6 per game? for 6 games? for a total cost of $6? , the games are $8 each? total cost is $33? number of games is 14? or total cost is $30? reset next

Which image (a’ b’ c’ d’) of abcd cannot he produced using only reflections ?