Answer:
27720
Step-by-step explanation:
Denote by 
the binomial coefficient "n choose k". Given k<n, 
is the number of ways of choosing k elements from a set of n elements (the order in which we choose the elements doesn't matter).
First, we can form the group of 3 students. This is done by choosing 3 students from the class of 12 students, so it can be done in 
ways. We can't repeat students, then we must form the other groups from the remaining 9 students. If we next form the group of 4 students, there are 
ways of choosing it. Now, there remain 5 students without a group, so they have to conform the group of 5 and this can only be done in 1 way. By the multiplication principle, the number of ways of forming the groups is 
Area=legnth times width
area=3/5
legnth=7/8
width=x
3/5=7/8 times x
divide both sides by 7/8 (aka multiply both sides by 8/7 to cancel fraction because 7/8 times 8/7=56/56=1)
8/7 times 3/5=56/56 times x
24/35=1 times x
24/35=x
width=24/35 mile
This statement is false, it is not true that any polygon with two pairs of parallel opposite sides is considered to be a parallelogram for it is defined opposite than that. That is why the correct answer in the statement above is that it is false.
Answer:
Cost of item : $6
Tax rate : 5%
Amount of tax = $0.3
Total cost = $6.30
Step-by-step explanation:
Cost of item : $6
Tax rate : 5%
Amount of tax = 5% * $6 = 0.05*6 = $0.3
Total cost = $6 + $0.30 = $6.30
