Answer:
see below
Step-by-step explanation:
The two terms 9 and -10 can be combined to give -1.
The two terms 2x and -18x can be combined to give -16x.
Fully simplified, the expression would be ...
-16x +14y -1
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Anything with different coefficients is not equivalent. Anything with only one pair of terms combined is "not fully simplified."
The number of different ways that three speakers can be selected is 10 ways
Given the names of choice to be Ben, Will, Stewart, Hilary, and Kate. This means that we have a total of 5 name choices.
If the members of students activities are to select three speakers among these people, the number of ways this can be done is by using the combination rule as shown;
From the question, n = 5 and r = 3. On substituting
Hence the number of different ways that three speakers can be selected is 10 ways.
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