0.3 is 10 times as great as what decimal?

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

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

What is the lcm of 16 and 40 ? 24 and 40 ?