What is the value of a in the equation 3 a plus b equals 54, when b equals 9?

Somone me i want to know what 18 hours out of 24 hours in a fraction

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2