Question

The equation y = 1.9 x can be used to determine the total weight in pounds, y, of the number of paperback books in the first printing of Zamir’s novel, x. The equation was used to fill in the table below.

Number of Books | Total Weight (in pounds)
100 190
150 ???
200 380
250 475

What value is missing from the table?

___ lbs.

Answer 1

Hi, subtract 475 from 380 you get 90 and then you can add 90 to 190 to get the unknown number

Answer 2

so \[475-380=90\]
\[90+190=a\]

\[a= ?\]