Answer:
the answer is 1/45
Step-by-step explanation:
just use the proportion method
4/11,9/13,6/25,0.48,0.624
Answer:
3x I guess
Step-by-step explanation:
or 3 times whatever x is
3x + 20 = 40 + 40
3x = 60
X = 20
V + 71 = 107
V = 36
Answer:
There are 5 black counters in the bag.
Step-by-step explanation:
15 green counters in the bag
The proportion of green counters is given by:

So, we have that, the total is x. So


There are 30 total counters.
How many black counters are in the bag ?
A sixth of the counters are black. So

There are 5 black counters in the bag.