Ab = x + 20 dc = 5x ad = x − 2 bc = ? quadrilateral abcd is a parallelogram if both pairs of opposite sides are congruent. show that quadrilateral abcd is a parallelogram by finding the lengths of the opposite side pairs. what is the length of bc?

Step-by-step explanation:

we know that

In a parallelogram opposites sides are parallel and congruent

so

AB=DC

BC=AD

step 1

Find the value of x

we have

substitute the given values

solve for x

so

step 2

Find the value of AD

Remember that

BC=AD

therefore

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.