Correct answers only !
a student number system for a county requires that the student number be 5 characters. the first 3 characters are any single digit number, but no number can repeat and the last 2 characters must be letters, but no letter can repeat. how many unique student numbers are possible?
a. 1,370
b. 131,040
c. 250,000
d. 468,000

 D) 468,000

Step-by-step explanation:

1st character has 10 choices (numbers 0 - 9)

2nd character has 9 choice (numbers 0 - 9 excluding 1st number)

3rd character has 8 choices (numbers 0 - 9 excluding 1st & 2nd numbers)

4th character has 26 choices (A - Z)

5th character has 25 choices (A - Z excluding 4th character)

Multiply 1st & 2nd & 3rd & 4th & 5th characters

             10  ×   9   ×   8   ×  26 ×  25  = 468,000

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total

3.how is solving radical equations different than solving linear equations?

step-by-step explanation: