To find the total work of two people at different speeds, we need to find a common speed limit to both.
In this case, Jordan can build a birdhouse in 2 hours so her speed is 1/2 birdhouse per hour.
For the sister, it takes 3 hours to build a birdhouse so her speed is 1/3 birdhouse per hour.
To find what they can do in one hour:

To find how long does it take to build a birdhouse:

Set the denominators equal:

Remove the denominators and solve:
Once again set the denominators equal:
Remove the denominators and solve for x:
6/5 hours is equal to 72 minutes.
Answer:
1.725 mph
There are 5280 feet in a mile, so you divide by that and get 12.075. Since it's seven hours, you divide by 7 and get 1.725.
If the lines on the sides or top wich ever u decide remain parallel if u draw them out and they dont touch tehn its a parallelgram sorry for the miss spellings i suck at english
Greatest common factor
faceor each and find common groups
18a=2 times 3 times 3 times a
20ab=2 times 2 times 5 times a tmes b
6ab=2 times 3 times a times b
common group is
2 times a
answe ris 2a
Sorry im not sure i understand the language your stating soo sorry