Answer:
7
Step-by-step explanation:
We need to plug in -1 for x. Here's what we get:
multiplying two negative numbers gives us a positive number
= 7
Answer:
first one
Step-by-step explanation: doesnt mention the number 8 variable anywhere
Answer:
f(x) = 
Step-by-step explanation:
2 times 7 = 14
since each of the 7 guests received 2 tacos
There are 680 combinations of four teachers include Mrs. Vera(only)
<h3>How to determine the number of combination?</h3>
The given parameters are
Teachers, n = 18
Selected teachers. r = 4
The selection must include Mrs. Vera.
So, the remaining parameters are:
Teachers, n = 17
Selected teachers. r = 3
The combination is then calculated as:
Ways = nCr
This gives
Ways = 17C3
Apply the combination formula
Ways = 17!/(14!3!)
Evaluate the expression
Ways = 680
Hence, there are 680 combinations of four teachers include Mrs. Vera(only)
Read more about combination at:
brainly.com/question/11732255
#SPJ1
