Answer:
$36 (see below)
Step-by-step explanation:
First, you have to find how much they paid for one ticket.
If they paid $12 for 3, then they paid $4 for 1.
You could've also use a ratio:
$12 $x
-------- = --------
3 1
Cross multiply:
$12 (1) = $3x
$12 = $3x
$4 = x
So $4 for 1 ticket.
To find the cost of 9 tickets, just multiply the price by the number of tickets, which is:
$4 (9) = $36
Answer:
True, there are 2 y's and 3 x's
Answer:
7(5y+7)
Step-by-step explanation:
7×5y=35y
7×7=49
so its 7(5y+7)
There are 6,840 different combinations of people for president, secretary, and treasurer, assuming that each person may have a single job at a time.
Start with 20 candidates for president.
That leaves 19 people for secretary.
And there are 18 people remaining for treasurer.
20 • 19 • 18 = 6,840
The set of values of the independent variable(s) for which a function or relation is defined. Typically, this is the set of x-values that give rise to real y-values. Note: Usually domain means domain of definition, but sometimes domain refers to a restricted domain. A function is a type of relation