The formula to find the discriminant equals D = b^2-4ac.
(Quadratic equations have the formula ax^2+bx+c. A = -1, B = +4, C = -2.)
D = 4^2-4(-1)(-2). 8-8 = 0.
0 = 1 solution
-D = 0 solutions
+D = 2 solutions
The discriminant equals 0, also establishing that if you were asked to find the solutions, there would only be one.
Answer:
2.4 mg I'm pretty sure
Step-by-step explanation:
Answer:
1/52
Step-by-step explanation:
To obtain the probability of drawing a 9 of spade from a deck of 52 cards ;
Probability = (number of required outcomes / number of total possible outcomes)
Number of Required outcomes = 1 (there is only one 9 of spade in a deck of 52 cards)
Hence,
P(9 of spade). = 1 / 52
Answer:
Option 2 is correct that could be used to solve the problem.
Step-by-step explanation:
Present age of Mary is x
And present age of John is y
Since, john is 5 years older than Mary hence, we get
y=x+5
In 10 years twice john's age is decreased by Mary's age by 35
2(y+10)-(x+10)=35
hence, Option 2 is correct which could be use to solve the problem.
Answer:
Neither, x can be a negative number as well. If there is context, please post more to the question.
Step-by-step explanation:
