Hello!
To the value of b, or the y-intercept, we need to substitute an ordered pair/point into the given equation.
Since we are given two points, we can use those two points to find two different equations.
Remember that ordered pairs are written as (x, y).
A(-2, 4)
y = -3x + b
4 = -3(-2) + b
4 = 6 + b (subtract 6 from both sides)
-2 = b
A) Therefore, the equation of the first ordered pair is y = -3x - 2.
B(5, 2)
2 = -3(5) + b
2 = -15 + b (add 15 to both sides)
17 = b
B) The equation of the second ordered pair is y= -3x + 17.
<u>Final answers</u>:
- A) y = -3x - 2
- B) y = -3x + 17
Answer:
I'm pretty sure the answer is the 2nd one.
The way I figured it out was:
First, I multiplied both sides by -3. *You can either divide by -1/3 or multiply by -3.
This canceled out the -1/3 and the 7 became a -21.
Also, when you divide or multiply by a negative, the inequality sign flips.
So you get greater than or equal to, not less than or equal to.
This is how I got: h is greater than or equal to -21.
So, we plug the values back into the formula. 1/2(145)(40)^2
First we square velocity, so it will be: 1600.
Then 1600*145 = 232000
Divide this by 2, so: 116,00
So, the kinetic energy would be 116,000.
Answer:
= 3.5 meters per second
Step-by-step explanation:
To find the rate, we take the distance and divide by the time
rate = 70meters / 20 seconds
rate = 70/20
= 7/2
= 3.5 meters per second
