How many hours did they drive in all explain why

The Jacobys drove 19 1/2 hours from Monday to Thursday.

Step-by-step explanation:

I started your problem by simply adding all of the hours up.

However, if you're like me, then you might not have a calculator that can work with fractions at hand right now or be able to add them up without second-guessing yourself on your own.

So, if you run into this problem then you can take the fraction part of the problem and just work it like a division problem.

3/4 = .75

1/4 = .25

Then, you can take the respective decimals, and bring them back to their whole number.

5.75

4.75

2.25

6.75

Then just add them all up:

5.75+4.75+2.25+6.75= 19.5

Now, if you need to revert it back to a fraction it could get tricky again. Luckily, this time we got an easy one! .5 which equals 1/2.

So, your answer would be 19 and 1/2.

*** If this answer is wrong I sincerely apologize. I believe it is correct but we all make mistakes.

CD

Step-by-step explanation:

Given that quadrilateral abcd is congruent to quadrilateral efgh

This means in the same order we have to take corresponding sides and angles and they would be equal.

Hence we have

angles :  A =E:  B =F: C=G:D=H

Sides: AB = EF:BC=FG:CD=GH:DA =HD

Hence from these we can conclude that CD =GH

So answer is CD