The sum of 8 and 5 times a number is 43. which equation below can be used to find the unknown number?

Can (3,5 and square root 34) be sides on a right triangle?

Someone me what is the area of this figure? 18m 18m 8m 16m

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