Answer:
answers are below
Step-by-step explanation:
1. k = -12
2. x = 14
3. y = -18
4. x = 34/3 or 11.3333333
5. x = -10
6. b = 17
7. x = 1/7
8. y = -2
Hope this heps!! Tell me if you need any explanations :)
I actually posted this a while ago and it got answerd by a smart person so here's what I understood
the error is that it assumes that √(x²)=x
because if x is negative, it becomes positive
that's how the 2nd line is wrong
the 2nd line is the first wrong step
it goes from 4-9/2+9/2
so it goes from 4-4.5+4.5
notice the part under the parenthsees
√((4-4.5)²)
if we evaluate 4-4.5, we get -0.5
but by squaring it we get 0.5
-0.5+4.5=4, yes
but when we square it we get
0.5+4.5=5, that is how it works
Answer:
The probability is ![\frac{3}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B20%7D)
Step-by-step explanation:
Consider a political discussion group consisting of 10 Democrats, 10 Republicans, and 5 Independents.
Total members of the group = ![10+10+5=25](https://tex.z-dn.net/?f=10%2B10%2B5%3D25)
Selecting 2 republicans in succession means selecting 1st republican out of 10 republicans and total 25 members and then selecting 2nd republican out of 9 left republicans and 24 members.
Hence, probability becomes:
![\frac{10}{25}\times \frac{9}{24}](https://tex.z-dn.net/?f=%5Cfrac%7B10%7D%7B25%7D%5Ctimes%20%5Cfrac%7B9%7D%7B24%7D)
= ![\frac{90}{600} =\frac{3}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B90%7D%7B600%7D%20%3D%5Cfrac%7B3%7D%7B20%7D)
So, the probability is ![\frac{3}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B20%7D)
Answer:
22 times
Step-by-step explanation: