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ella [17]
3 years ago
7

A student ID number is a letter of the alphabet followed by 2 digits. How many different IDs are possible if the digits can be r

epeated?
Mathematics
1 answer:
mars1129 [50]3 years ago
4 0
First, there are 26 distinct alphabets and 10 distinct digit numbers.

Then, the first digit of ID has 26 possibilities.

For the rest of 2 digits, the total cases are 10*10 = 100 possibilities.

However, there are 10 cases are repeated when two digits are the same. so you have  to subtract it by 10

So answer will be 26 * (100-10) = 23400

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When a number is a multiple of 6, what are the possible values for the ones digits?
Liula [17]
I would do this by first listing the multiples of 6 until I start to see a pattern with the one's digit.
6x0=0
6x1=6
6x2=12
6x3=18
6x4=24
6x5=30
6x6=36
6x7=42
6x8=48
...
The digits in bold are the one's digits so those are the only ones we really care about.  If you list just them it looks like: 0,6,2,8,4,0,6,2,8
Notice how the first set of 5 numbers seems as though it repeats in the 6th, 7th, and 8th numbers.  This probably means the pattern continues infinitely so the first 5 numbers are all the one's digits that can come from multiples of 6.  Thus your answer is: 0,6,2,8,or 4 
7 0
3 years ago
Goods that cost 1/5 of one dollar in the U.S. cost one kroner in Denmark, the real exchange rate would be computed as how many D
hodyreva [135]

Answer:

The amount of Kroner that can be bought from 1/5 of one dollar.

Step-by-step explanation:

We have been given that goods that cost 1/5 of one dollar in the U.S. cost one kroner in Denmark. We are asked to find the the real exchange rate that would be computed as how many Danish goods per U.S. goods.

The real exchange rate tells us how much foreign currency can be exchanged for a unit of domestic currency.

It also tells us that how much the goods and services in the domestic country can be exchanged for the goods and services in a foreign country.

Therefore, the real exchange rate would be the amount of Kroner that can be bought from 1/5 of one dollar.

5 0
3 years ago
Which set of coordinates satisfies the equations 3x - 2y =15 and 4x - y = 20
babymother [125]

You use elimination the get x=5 and then plug it in to get y=0 so the coordinate is (5,0)

4 0
3 years ago
The velocity-time graph for a cycle is shown
malfutka [58]

Answer:

<u>a) 100m</u>

<u>b) 2m/s</u>

Step-by-step explanation:

a)==>> <u>2+4</u>+<u>6+8</u>+10(8) = 100m

b)==>> Variable "a" = change OVER time (\frac{change}{time}) = 8m/4s = 2m/s

5 0
3 years ago
Round 368cm to the nearest meter
Bogdan [553]
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4 0
3 years ago
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