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Crank
3 years ago
9

Module 2 - Lesson 23

Mathematics
1 answer:
Anuta_ua [19.1K]3 years ago
7 0

Answer:

I

Step-by-step explanation:

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what is the units digit of the sum of 1!+2!+3! ... n! when n=2019. Include an explanation and what a unit digit is.
horsena [70]

Hey!

Finding the factorial for the first few numbers, we have:

1!=1

2!=2

3!=6

4!=24

5!=120

6!=720

7!=720*7

8!=720*56

What we can see as a clear pattern from 5! and on is that our number ends with a 0, making the units digit 0. Therefore, when we add the units digit of 5! and on, we have a result of 0. So, we can simply add the units digits of 1!, 2!, 3!, and 4!, which is 1+2+6+4=13. Since the units digit is the last number, we can drop the tens place to get an answer of 3.


Feel free to ask further questions!

8 0
4 years ago
What is y + 11 = 1/3(x + 3) in standard form?
lorasvet [3.4K]
Standard form is y=Mx+b so first step is to isolate y:
Y=1/3(x+3)-11

Then use order of operations to simplify the x to a whole number. First multiply by three:
3y=x+3-33

Now combine like terms:
3y=x-30

Finally,
Divide to make y have a coefficient if one:

Y= 1/3x -10
3 0
3 years ago
Which number line shows the inequality n < -1?
nordsb [41]

Answer:

The second line

Step-by-step explanation:

8 0
3 years ago
What expression is equivalent to 4 to the negative 3 power
Elina [12.6K]

Answer:

1/64

Step-by-step explanation:

4^(-3)

1/4³

1/64

4 0
3 years ago
A right triangle has side lengths 8,15, and 17. (SHOWN IN THE PICTURE). Use the lengths to find. (PLZ HELP)​
slava [35]

Answer:

At le*st ra*e me b*ainiest so I can have some m*tivations

Cause ur usi*g me....

TanA = 8/15

sinA = 8/17

cosA = 15/17

8 0
3 years ago
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