Answer:
4
Step-by-step explanation:
2-(-2)=2+2=4
Answer:
Jody
Step-by-step explanation:
You can either convert 500 seconds to minutes or 8 minutes to seconds to compare. I'll do both.
There is 60 seconds in a minute. To find the total minutes of 500 seconds, divide 500 by 60 → 8.3, which means that Jody practiced for 8.3 minutes.
To find the total seconds of 8 minutes, multiply 60 seconds per minute by 8 minutes → 60 * 8 = 480 seconds which means that Bill practiced for 480 seconds.
Now you can compare. Jody practiced for 500 seconds, or 8.3 minutes. Bill practiced for 480 seconds, or 8 minutes. Jody practiced longer.
Answer:
-7
Step-by-step explanation:
3m-4=5m+10
-2m-4=10
-2m=14
m=-7
Answer:
Step-by-step explanation:
a) Yes.
![\forall\ a,b\ \in\ B,\ a+b\in B\ (since\ 0+0=0)](https://tex.z-dn.net/?f=%5Cforall%5C%20a%2Cb%5C%20%5Cin%5C%20B%2C%5C%20a%2Bb%5Cin%20B%5C%20%28since%5C%200%2B0%3D0%29)
b) Yes
![W=\{0,1,2,3,..,\}\ (whole\ numbers)\\\forall\ a,b\ \in\ 3W,\ a+b\in 3W\\since:\\a\ \in\ 3W \Longrightarrow\ \exists\ k_1\in W | a=3*k_1\\\\b\ \in\ 3W \Longrightarrow\ \exists\ k_2\in W | b=3*k_2\\\\a+b=3*k_1+3*k_2=3*(k_1+k_2) \in 3W\\](https://tex.z-dn.net/?f=W%3D%5C%7B0%2C1%2C2%2C3%2C..%2C%5C%7D%5C%20%28whole%5C%20numbers%29%5C%5C%5Cforall%5C%20a%2Cb%5C%20%5Cin%5C%203W%2C%5C%20a%2Bb%5Cin%203W%5C%5Csince%3A%5C%5Ca%5C%20%5Cin%5C%203W%20%5CLongrightarrow%5C%20%5Cexists%5C%20k_1%5Cin%20W%20%7C%20a%3D3%2Ak_1%5C%5C%5C%5Cb%5C%20%5Cin%5C%203W%20%5CLongrightarrow%5C%20%5Cexists%5C%20k_2%5Cin%20W%20%7C%20b%3D3%2Ak_2%5C%5C%5C%5Ca%2Bb%3D3%2Ak_1%2B3%2Ak_2%3D3%2A%28k_1%2Bk_2%29%20%5Cin%203W%5C%5C)
c) Yes
![\forall n\ \in\ \mathbb{N}: \Longrightarrow\ n+1 \in\ \mathbb{N}\\](https://tex.z-dn.net/?f=%5Cforall%20n%5C%20%5Cin%5C%20%5Cmathbb%7BN%7D%3A%20%5CLongrightarrow%5C%20n%2B1%20%5Cin%5C%20%5Cmathbb%7BN%7D%5C%5C)
d) No
![3\in V , 3+3=6\notin V\\](https://tex.z-dn.net/?f=3%5Cin%20V%20%2C%203%2B3%3D6%5Cnotin%20V%5C%5C)
Answer:
<h2>4,520,389 = 4M + 5CM + 2DM + 3C + 8D + 9U</h2>
Step-by-step explanation:
In this proble, we defined:
- D represents tens.
- C represents hundreds.
- M represents millions.
- U is units.
So, the given number is 4,520,389, where we need to state the proper variable according to the position of each digit and its value.
4,520,389 = 4M + 5CM + 2DM + 3C + 8D + 9U
In words, the first term represents 4 millions, the second term represents 5 hundred thousands, the third term represents twenty thousands, the fourth term represents three hundreds, the fifth term represents eighty and the las term represents 9 units.