Alex is tilting his entryway. the floor plan is drawn on a unit grid. each unit length represents 1 foot. tile costs $3.15 per square foot. how much will alex play to his tile entryway?

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

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