Answer:
1 mph
Step-by-step explanation:
EQUATIONS:
b+c = 7 mph
b-c = 5 mph
------------
Add the two to get:
2b = 12 mph
b = 6 mph (speed of the boat in still water)
c = 1 mph (speed of the current)
C
I would say C because,
Even + Even = Even.
Odd + Odd = Odd.
So simply, you can't have an even number if you add it to a odd.
Even + Odd = Odd
They are all divisible by 25.
4x + 11 = k
<=> 4x = k - 11
<=>
Count the number of elements in A
n(A) = 4
what can you explain your question a bit more