<span>3/5t - 4 - 7/10t = -2
</span><span>3/5t - 7/10t = -2 + 4
</span><span>6/10t - 7/10t = 2
-1/10t = 2
t =2 (-10)
t = -20
answer is </span>A. -20
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:
it's 13a+2 pal!
Step-by-step explanation:
Answer:
10000
Step-by-step explanation:
there is a simple formula to remember.
the sum of n odd number = n^2
so for the sum of 100 positive odd numbers = (100)^2=10000