Answer:
No real solutions
Step-by-step explanation:
Use the discriminant to determine the number of real solutions to a quadratic equation.
The general form for a quadratic equation is ax² + bx + c
The discriminant is b² - 4ac
The following 3 rules apply...
1. If b² - 4ac > 0, then there are 2 real solutions
2. If b² - 4ac = 0, then there is one real solution
3. If b² - 4ac < 0 then there are no real solutions
For this problem,
a = 5
b = 6
c = 4
Plug them into b² - 4ac....
6² - 4(5)(4)
36 - 80
-54 so b² - 4ac < 0 , there are no real solutions
Answer:
Step-by-step explanation:
A function is one-to-one if it passes the horizontal line test. This is the case if a horizontal line intersects the graph in only one place.
The graph of f(x) = x^2 - 5 is that of a parabola that opens upward. There are several possibilities here:
1. The horizontal line intersects the parabolic graph twice on the interval (-infinity,+infinity). Therefore this function is not one-to-one on this interval
(-infinity,+infinity).
2. If we define the domain as [0,+infinity), a horizontal line will intersect this parabolic graph only once. Therefore this function is one-to-one on [0,+infinity).
3:6 ratio is 1:2
9:24 ratio is 3:8
( C. ) m + 1 = 2
<u>Step-by-step</u><u> </u><u>explanation</u><u>:</u>
m + 1 = 2
⇒ m = 2 - 1
⇒ m = 1
Answer:
Let Greg's height be = x
According to the question;
So, Greg's height (x) = 15 years