Answer:1/4 divided by 1/4=8 so ye it is greater than 1 !!!
Step-by-step explanation:
Answer: I would assume you mean 105 in radius to diameter which would be 210 since diameter is just radius times 2. <u>Otherwise, explain the question more since it's barely legible.</u>
By multiplication of fractions, we will see that runner B needed 7/20 of a minute.
<h3>Writing the equation</h3>
So we know that runner A finishes the race in 5/12 of a minute.
We also know that runner B was faster, he ran the same distance in a 21/25 of the time that took A.
To get the time that runner B needed, we just need to multiply these two fractions, so the equation we need to solve is just:
Where to simplificate it I just divided both the numerator and denominator by 5 and then by 3, to get the fraction 7/20, that is in the simplest form.
So we can conclude that runner B completed the race in 7/20 of a minute.
If you want to learn more about the multiplication of fractions, you can read:
brainly.com/question/3612844
Answer:
f(x) = -3x^2 + 10x + 3
Step-by-step explanation:
(0,3) (2,11)(3,6)
Using the form ax^2 + bx + c = y
From the first set we know that c = 3
Write an equation for the last two sets
x=2; y=11
a(2^2) + b(2) + 3 = 11
4a + 2b = 11 - 3
4a + 2b = 8
simplify divide by 2
2a + b = 4
and
x=3, y=6
9a + 3b + 3 = 6
9a + 3b = 6 - 3
9a + 3b = 3
simplify divide by 3
3a + b = 1
:
Use elimination to find a
3a + b = 1
2a + b = 4
--------------subtracting eliminate b
a = -3
Find b using the equation 2a + b = 4
2(-3) + b = 4
b = 4 + 6
b = 10
:
The equation: f(x) = -3x^2 + 10x + 3