Use the app Math-way or photo math they are helpful, you can literally take a picture of your work and have step by step explanation too
Answer: First option
Step-by-step explanation:
By definition:
![(a+b)^2=a^2+2ab+b^2](https://tex.z-dn.net/?f=%28a%2Bb%29%5E2%3Da%5E2%2B2ab%2Bb%5E2)
Then, you can simplify the numerator as following:
![\frac{(x+1)^2-9}{(x+4)}=\frac{x^2+2x+1-9}{(x+4)}=\frac{x^2+2x-8}{(x+4)}](https://tex.z-dn.net/?f=%5Cfrac%7B%28x%2B1%29%5E2-9%7D%7B%28x%2B4%29%7D%3D%5Cfrac%7Bx%5E2%2B2x%2B1-9%7D%7B%28x%2B4%29%7D%3D%5Cfrac%7Bx%5E2%2B2x-8%7D%7B%28x%2B4%29%7D)
Factor the numerator. Find two number whose sum is 2 and whose product is -8. THese would be 4 and -2. Then:
![=\frac{(x+4)(x-2)}{(x+4)}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B%28x%2B4%29%28x-2%29%7D%7B%28x%2B4%29%7D)
Simplify. Then you obtain:
![x-2](https://tex.z-dn.net/?f=x-2)
Answer:
B
Step-by-step explanation:
In probability, "AND" means to multiply and "OR" means to add.
Here they want probability of steel penny ( P(s) ) "OR" probability of lincoln penny ( P(l) ).
Let's find the individual probabilities and "ADD" them.
P(s) = 5/50 (since there are 5 steel pennies and there are 50 coins in total)
P(l) = 5/50 (since there are 5 lincoln pennies and there are 50 coins in total)
So probability of 5 steel penny and 5 lincoln penny = 5/50 + 5/50 = 10/50 = 1/5
1/5 is equal to 20%, correct answer is B
Answer: 2x square root 11x
Step-by-step explanation:
Answer:
the slope is 1/7
Step-by-step explanation:
rise/run
rise=1
run=7