Answer: 300a^3cb
Step-by-step explanation:
Answer:
100
Step-by-step explanation:
I assume you mean of the students in Year 9.
Basically, first you need to work out 1/12 of the students, which is just 240 divided by 12, equals 20.
So, we know 1/12 of 240 is 20, therefore, in order to work out 5/12, we must do 20 x 5, which is 100.
The four-fifths of a number, in this case, z is four times the number divided by z. That is 4z/5. When we add six to the product and equate the expression to 8, we get,
4z/5 = 8
The value of z from the equation is 10.
Answer:
8
Step-by-step explanation:
77+50=127
180-127=53
7x-3=53
7x=53+3
7x=56
x=56/7
x=8
Answer:
The current is 5 mph
Step-by-step explanation:
The current helps the boat going down stream and hinders going up so it adds to the speed downstream and subtracts going up.
speed downstream is 20miles/40minutes =1 mi per 2 min. Or 30 mph
Speed upstream is
20 miles/ 60 minutes = 1 mile per 3minutes or 20 mph
So if the speed of the boat is the same (s) then downstream the boat travels
S+c =30 mph and s-c =20mph upstream if c is tge current speed
So s=30-c and s=20+c
So. 30-C=20+c
10=2C
5=C
The current is 5 mph