Answer:
The area of a circle with a circumference of 18.84 is 28.26 units²
Step-by-step explanation:
Given:
Circumference = 18.84
Let R be the Radius of a Circle
pi = 3.14
To Find:
Area of Circle = ?
Solution:
We Know that,
Substituting the values we get the radius
Now Formula for calculating Area of Circle is given as
Substituting the Radius we get
The area of a circle with a circumference of 18.84 is 28.26 units²
You just add or subtract from the x and y
Hello from MrBillDoesMath!
Answer:
+2
Discussion:
-8 (17 - 12) / ( -2 (8 - (-2)) ) -
= -8 ( 5) / ( -2 ( 8+2)) as 17 -12 = 5 and -(-2) = +2
= -40/ ( -2 (10))
= -40/(-20) =
= +2
which is the third choice.
Thank you,
MrB
Answer:
Explanation:
<u>1. Data:</u>
i) Distance traveled by the cars:
ii) Speed of the cars:
iii) Time to arrive at the suburb:
- t₂ - t₁ = 2 hour ⇒ t₂ = t₁ + 2
<u>2. Equations:</u>
time = distance / speed
- t₂ = 480 / v₂
- t₁ = 480 / v₁ = 480 / (v₂ + 20)
t₂ - t₁ = 2 hour
↓ ↓ ↓
480/v₂ - 480/ (v₂ + 20) = 2
<u>3. Solve the equation</u>
480(v₂ + 20) - 480(v₂) = 2 × (v₂ + 20) (v₂)
240(v₂ + 20) - 240(v₂) = (v₂ + 20) (v₂)
240v₂ + 4800 - 240v₂ = (v₂)² + 20v₂
(v₂)² + 20v₂ - 4800 = 0
(v₂ + 80) (v₂ - 60) = 0
v₂ = - 80
v₂ = 60
Only the positive solution has physical meaning:
- v₁ = 60km/h + 20km/h = 80km/h ← answer
