¡!URGENT!¡ Find the surface area of the space figure represented by the net

1. 173.5 cm²
2. 263 cm²
3. 191 cm²
4. 245.5 cm²​

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

Sal is tiling his entryway. the floor plan is drawn on a unit grid. each unit length represents 1 foot. tile costs $1.35 per square foot. how much will sal pay to tile his entryway? round your answer to the nearest cent.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.