I'LL GIVE BRANLY!!!!!
2 answers:
Answer:
20
Step-by-step explanation:
If the order matters, we can use the product rule to show each of the coins can be chosen in
ways, for a total of
ways, assuming you have enough of each type of coins.
If the order does not matter (which in the case it probably does not) you have to use an r-combination. The formula is. Here
and
. So we get
.
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Answer:
We have that y = 21 when x = 11.
Step-by-step explanation:
We solve this question by proportions, using a rule of three.
Since they vary inversely, we apply the inverse rule of three, that is, with lateral multiplication instead of diagonal.
33 - 7
y - 11
So
Dividing both sides by 11
We have that y = 21 when x = 11.