Urgent! explain to me how to solve this. : )

The population increases by 500 each year, so multiply the number of years that have passed since 1990 by 500.

1999 - 1990 = 9 years

9 years * 500 = 4,500

Add 4,500 to 22,317 inhabitants.

22,317 + 4,500 = 26,817

Your answer is B) 26,817 inhabitants.

() *0.06

Step-by-step explanation:

Cleo buys x packs of markers, y wide-ruled notebooks, and z college-ruled notebooks.

All spiral-bound notebooks, whether wide-ruled or college-ruled, sell for $1.20 each. This gives expressions : 1.20y and 1.20z

A store sells four-packs of permanent markers in assorted colors for $3.19 per pack. Cleo buys x packs of markers so expression becomes :

(3.19 per pack)

As Cleo buys x packs of markers, y wide-ruled notebooks, and z college-ruled notebooks.

The combined expression becomes:

The store charges a 6% sales tax on Cleo’s total bill. So, expression becomes:

() *0.06