x y x^2 xy
2 100 4 200
4 83 16 332
6 50 36 300
8 35 64 280
10 23 100 230
∑x = 30; ∑y = 291; ∑x^2 = 220; ∑xy = 1,342; n = 5
The <span>least squares regression line equation is given by y = bx + a = -10.1x + 118.9.</span>
Answer:
Part A)
Part B)
Step-by-step explanation:
Part A)
Let
----> length song
----> length song
----> length song
----> length song
----> length song
-----> break between each song
we know that
The length of the CD is equal to
substitute the values
Part B)
Subtract the total length of the CD from minutes of music
so
Since the two angles have a sum of 90 degrees, we can add the two expressions together and set it equal to 90.
Answer:
x=7
Step-by-step explanation:
I got this because it is rise over run
The missing number would be 3, and if you add that three to 4 you get 7. which means that the answer is...
(7,12)
<h2>Hope this helps you!!!</h2>
Answer: x=2 and y=4/3
Step-by-step explanation:
To solve by substitution method, you want to solve for one variable, and plug it into the other equation.
Let's solve for y in 2x+3y=8.
[subtract both sides by 2x]
[divide both sides by 3]
Now that we have y, we can plug it into the second equation.
[plug in y]
[multiply 3 and y to cancel out the 3]
[distribute -1 to 8-2x]
[combine like terms]
[add both sides by 8]
[divide both sides by 11]
Since we know the value of x, we can substitute it back into any of the 2 equations to find y.
[plug in x=2]
[multiply 2 and 2]
[subtract both sides by 4]
[divide both sides by 3]
Our final answer is x=2 and y=4/3.