Completing the square has us breaking rules of solving equations and factoring out the greatest common factor, but it is what it is! The first step is to make sure that the coefficient on the x^2 term is a 1 and it is so we are good there. Now subtract 9 from both sides to get x^2 + 16x = -9. Complete the square on the left side by taking half of the linear term (16x) which is 8 and then squaring it to get 64. That's what is added to both sides. Now it looks like this:
x^2 + 16x + 64 = -9 + 64. If you were to write it in vertex form it would look like this: (x+8)^2 - 55 = 0. Now you can use this to plot the vertex of a parabola if you want to: it sits at (-8, -55)
What is the interquartile range from the numbers 19, 23, 26, 28, 28, 30, 31, 35, 38 , 40, 43, 46
kupik [55]
Do you know how to calculate an IQR?
Answer:
48 : 60 56 : 70 64 : 80
Step-by-step explanation:
hope this helps
Answer:
Standard Form. more ... A general term meaning "written down in the way most commonly accepted" It depends on the subject: • For numbers it means "Expanded Form" (such as 125 = 100+20+5), but in Britain it means "Scientific Notation"
Step-by-step explanation:
I=P*R*T
I - Interest
P - Principal (how much you invest) - $1025
Rate - Interest rate - 6.5% = . 065
T - Time - 5 years
I = 1025*.065*5
The interest is $333.13 (333.125 rounded)
The ending balance is interest+principal
$333.13+$1025=$1358.13
Ending Balance = $1,358.13