Answer:
x = -2 ± sqrt(5)
Step-by-step explanation:
x^2 + 4x – 1= 0
Add 1 to each side
x^2 + 4x – 1+1= 0+1
x^2 +4x = 1
Take the coefficient of x
4
Divide by 2
4/2 =2
Square it
2^2=4
Add it to each side
x^2 +4x+4=1+4
(x+2)^2 = 5
Take the square root of each side
sqrt((x+2)^2 )=± sqrt(5)
x+2 = ± sqrt(5)
Subtract 2 from each side
x+2-2 = -2 ± sqrt(5)
x = -2 ± sqrt(5)
Answer:
1:2
Step-by-step explanation:
If its just apples to bananas then it would be 1:2
Answer:
ummm i cant see the question it is sidewards
Step-by-step explanation:
Using Venn probabilities, it is found that P(F) = -0.07, which is not a probability, as it is a negative value.
------------------
- We have two events, E and F.
- Their probabilities are:

- The probabilities are related by the following equation:

- Replacing into the equation, we can find P(F).



P(F) = -0.07, which is not a probability, as it is a negative value.
A similar problem is given at brainly.com/question/21421475
Answer:
The equation given in the question matches the situation C.
Step-by-step explanation:
A. The amount that Cindy paid for books was 15% of p i.e. it is only
B. The amount is given to a charity after saving 15% of p. That means if p is the amount of charity, then there were a savings of 15% of p.
Therefore, the total charity payment after savings = p - 15% of p =
C. The amount that Sandy paid for a shirt with 15% tax on p.
Therefore, if the price of a shirt is p, then total payment of Sandy after tax is = p + 15% of p =
Hence, the equation given in the question matches the situation C. (Answer)