In trapezoid ABCD, AB || CD, MZA=90°, AD=8 in, DC=9 in, CB=10 in, and ZB is acute. Find DB. Thanks!

Which is the most efficient first step to solve x in the equation 3.7x - 18 = -4.3x -34 a. add 3.7x to both sides of the equation. b. add 4.3x to both sides of the equation. c. subtract 18 from both sides of the equation. d. subtract 34 from both sides of the equation.

The radical equation 2+√2x-3 = √x+7 has a solution set [x= a0} and an extraneous root x = a1.

Use the distributive law to multiply. 3(4x + 5y + 6)