Question

Please help solve number 30 and 31 please-show work to help me unerstand, thank you. :)

Answer 1

$-2(1-x) \leq 2x-7\\-2+2x \leq 2x-7\\-2 \leq -7\\\sf There~are~no~solutions~to~this~inequality$

There are no solutions because the last, final inequality is false.

$\sf Number ~of ~20~dollar~bills = n\\20n \leq 100\\n = 5$
You can only take a maximum of 5 twenty dollar bills in one transaction.