Answer:
Correct option: C -> 2
Step-by-step explanation:
The first equation is:

And the second equation is:

From the second equation, we have:

Using this value of y in the first equation, we have:




Calculating the discriminant Delta, we have:

We have
, so we have two real values for x, therefore we have two solutions for this system.
Correct option: C.
(If the system of equation is actually:


We would have:





We also have
, so we have two solutions for this system.
Correct option: C.)
Answer:
Amplitude 3; midline y=2
Step-by-step explanation:
The midline is the mean of both ends of the function in the graph.

The amplitude is the vertical distance between the midline and one of the end points.

(sorry for the basic math, i just want to make sure you know where im getting the values from)
Answer: Are there answer options?
Step-by-step explanation:
Hi there, first divide 24 by 80: 24÷80=30, Therefore, 24 is 30% of 80
Answer:
Step-by-step explanation:
<u>Using the the equation </u>
<u>The ball hits the ground, when h = 0, solving below equation:</u>
- 100t − 16t^2 = 0
- 4t(25 - 4t) = 0
- t = 0 seconds, this is the starting point when ball was hit
- 25 - 4t = 0 ⇒ 4t = 25 ⇒ t= 25/4 = 6.25 seconds later the ball hits the ground