If you look at the quadratic formula:
x=(-b±√(b^2-4ac))/(2a)
We can say that -b=5, b=-5
If I read it right you had ±2√7 which is equal to ±√28, and we know b=-5 so:
±√(25-4ac)=±√28
And since 3=2a, a=1.5 making the above:
±√(25-6c)=±√28
25-6c=28
-6c=3
c=-0.5
So a=1.5, b=-5, and c=-0.5 thus
y=1.5x^2-5x-0.5
We can check this by reapplying the quadratic formula to the equation above
x=(5±√(25-4(1.5)(-0.5))/3
x=(5±√(25+3))/3
x=(5±√28)/3
x=(5±√(4*7))/3
x=(5±2√7)/3
Answer:
(1/5 mi) / (1/15 hr) = 1/5 * 15/1 = 3 mi/hr
Step-by-step explanation:
Well let's remember the place values in order to solve this
Hundred thousands, Ten thousands, Thousands, Hundreds, Tens, Ones
(Notice how the 3 is in the thousands place)
Now lets separate these place values from the number shown in the question
700,000 + 40,000 + 3,000 + 100 + 80 + 2
As we see up there ^. The thousands place shows the number 3,000
3,000 is your answer
Step-by-step explanation:
everything can be found in the picture above. Hope this helps
Answer: dot plot 1 is 6
dot plot 2 is 15
dot plot 3 is 13
dot plot 4 is i dont know
Step-by-step explanation:
