In this quadratic equation a=9 b=0 c=64, you could use the Quadratic Formula:
x = [-b +-sqrt (b^2 -4*a*c)] / 2*a
x = 0 +- sqrt (0 -4*9*64) / 2*9
x = +- sqrt(-2,304) / 18
x = + 48 i / 18
x = -48 i /18
Where "i" is the square root of minus 1.
<span>0.54 = 54⁄100</span>
When you simplify 54/100 you get:
<span>27⁄50</span><span> <---Final answer. </span>
Answer:
standard error = 2.11
Step-by-step explanation:
First we stablish the data that we have for each sample:
<u>Population 1</u> <u>Population </u>2
n₁ = 100 n₂ = 90
x¯1= 95 x¯2 = 75
σ₁ = 14 σ₂ = 15
To calculate the standard error of each sample we would use the formulas:
σ = σ₁/√n₁
σx¯2 = σ₂/√n₂
Now, in order to obtain the standard error of the differences between the two sample means we combine those two formulas to obtain this:
σx¯1 - σ x¯2 = √(σ₁²/n₁ + σ₂²/n₂ )
So as you can see, we used the square root to simplify and now we require the variance of each sample (σ²):
σ₁² = (14)² = 196
σ₂² = (15)² = 225
Now we can proceed to calculate the standard error of the distribution of differences in sample means:
σx¯1 - σx¯2 = √(196/100 + 225/90) = 2.11
This gives an estimate about how far is the difference between the sample means from the actual difference between the populations means.
Answer:
Answer below
Step-by-step explanation:
If you mean constant of proportianality, that is just basically the unit rate. If you have point on the graph, you probably want to write down their coordinates. once you do that you see if the line are going up right diagonally or left diagonally. once you do that, you going to want to take the y coordinate from the highest point on the graph and subtract the y from the lowest point on the graph. repeat for x. finally, put the y answer over the x over to create a fraction. if you can make it a whole number do that, but most teachers won't want you to convert it to a mixed number.
I hope I answered what you were actually asking for lol.