Answer:
40/9
Step-by-step explanation:
Use the work formula, 
+ 
= 
, where A is the amount of time it takes one person, B is the amount of time it takes another person, and T is the time it takes for them to work together.
Plug in the times for David and Alex alone:
+ 
=
Find the least common denominator, which is 40.
+ 
=
=
Cross multiply and solve for T:
9T = 40
T = 40/9
So, if they worked together, it would take them 40/9 hours
Putting it in the middle sorry if it isnt right i never was really good at these but i tried.
You would plug in 4 for x.
f(4)= (4) - 6 = -2
Answer:
63/9 = 7 -> Yes
-94 -> Yes
30/6 = 5 -> Yes
-16/3 ~ -5,33 -> Nope
-29,86 -> Nope
Step-by-step explanation:
Integers are whole Numbers.
For example 1,2,3,4,5...
The numbers between numbers are rational numbers.
Fir example:
1,2 ( between 1 and 2)
3,8 (between 3 and 4)
2,6 (between 2 and 3)
Answer:
150
Step-by-step explanation:
Round 85 to 90 and 61.7 to 60
