Answer:
hrs/house
Step-by-step explanation:
Rate is the amount of work done per unit of time;
Let Cara's rate = C
Let Jena's rate = J
C + J = 4 ------ i
Now;
Working alone:
Jena takes twice as long as Cara
J = 2C ---- i
How long does it take Cara to clean a house alone
C + J = 4
J = 2C
C + 2C = 4
3C = 4
C = hrs/house
You plug in the values so it would be 24=15k. Divide by 15 on both sides so k=24/15=1.6. :)
Answer:
3. How many faces do each of the following have?
- cube - 6 faces
- square pyramid - 5 faces
- triangular pyramid - 4 faces
- pentagonal pyramid - 6 faces
Hope this helps!
5x=39 x stands for the age of bob so 39/5 =7.8 which is rounded up to 8 and if you multiply 8 by 5 you get 40 but if you multiply 7.8 by 5 you get 39 so his age would be 7.8 years old.
