The senior students have large lockers that line the school's southern hallway in a single row. A group of 7 friends agreed to choose lockers next to each other. How many different ways can the students choose adjacent lockers?

84 different ways

Step-by-step explanation:

you have to do

7+6+5+4+3+2+1=28

6+5+4+3+2+1=21

5+4+3+2+1=15

4+3+2+1=10

3+2+1=6

2+1=3

1=1

28+21+15+10+6+3+1=84

84 different ways

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b