Answer:
Step-by-step explanation:
14x + 7y is the correct answer
Let's begin by listing out the information given to us:
There are four students: n = 4
Number of students to be selected: r = 2
To calculate the combination of 2 students to be chosen, we use:

Therefore, there 12 possible combinations from these
Answer:
It is D
Step-by-step explanation:
Distribute:
=(4)(5m)+(4)(3)+2m
=20m+12+2m
Combine Like Terms:
=20m+12+2m
=(20m+2m)+(12)
=22m+12
Answer:
t55=d
Step-by-step explanation:
55 is mph and since t is time t would be multiplied by 55
Answer:
100 minutes and yes
Step-by-step explanation: