Solve 2x^2+3x=20 by completing the square

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

Tatiana wants to give friendship bracelets to her 32 classmates. she already has 5 bracelets, and she can buy more bracelets in packages of 4. write an inequality to determine the number of packages, p, tatiana could buy to have enough bracelets.

Write the slope intercept equation for line ab.