Bill says that he can add 23 and 40 without regrouping. is bill correct? how do you know?

Perform the required operations on the following functions given: f(x)= 3-x; g(x)= -2x find g[f(x)]

For a read-a-thon, jay and odhràn each started reading a book at the same time and continued reading for several hours. jay's book had 278 pages, and he read 55 pages per hour. odhràn's book had 238 pages, and he read 45 pages per hour. after how many hours did they have the same number of pages left, and how many pages were left?

1. are the triangles similar and if so why? what is the value of x? show your work.