Answer:
1. 3(9K-2)
2. 5(x+12y)
Step-by-step explanation:
Answer:
B. The problem involves a combination because the order in which the letters are selected does not matter.
Step-by-step explanation:
Computation technique is a method of statistics to find possible ways of combination. In computation technique it is assumed that order does not matter and letters will be selected at random. Permutation is a statistics technique to find possible ways of combination when the order does matter. Permutation technique cannot be used when order does not matter.
Answer:
cos²x.sec²x =1 (formula)
cos and sec are reciprocal to each other
cos²x=1/sec²x
now from the eq above,open the brackets and multiply
1-cos²2x
sin²2x
For this case we have a relationship of the form:

There are 70 children on the field trip
Therefore, we must replace the value of c = 70 in the equation.
We have then:

Clearing t, we have:
Answer:
there are 15 teachers on the trip