Mark bikes 4/10 of a mile in 1/5 of an hour. find marks average speed in miles per hour.

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

Multiplying fractions by whole number 5 x 1/3=?

Write the standard form of an equation with (see picture below)