Penelope has a loyalty card good for a discount at her local grocery store. The item she wants to buy is priced at $21, before discount and tax. After the discount, and
before tax, the price is $17.22. Find the percent discount.

Add. express your answer in simplest form. 12 9/10+2 2/3 = i need u guys to me find the answer to this question

Which two properties of equality could zoe use to finish solving for x? the equation is 3x - 4 = -10 for x so a either the addition or subtraction property of equalityb ether the multiplication or division property of equality c ether the addition or division property of equality d ether the subtraction or division property of equality just a simple a b c or d plz.

The equation for two lines in the coordinate plane are 2dx+y=4 and -6x+y=3, where d represents an unknown value. what value(s) of d would make these lines parallel?