Rsubtracted from 378 is the same as 223

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect

What is the simplified form of square root of 400 to the 100th power ?

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!