Heidikae reads 420 pages a week. In the summer, she reads 17% less. Approximately how many pages per week does she read in the summer.

The sum of two numbers is 86, and their difference is 20. find the two numbers

With finding limits of multi variable !

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.