Answer:
3060°
Step-by-step explanation:
19-2 = 17
17 x 180 = 3060
If 480 tickets cost $2580, 1 student ticket is $4, 1 adult is $6. Lets try dividing. 2580/6 and 2580/4. 2580/6=$430 and 2580/4=$645 again. 4 dollars per student and 6 dollars per adult. for the students, I would say approx. of 215 student tickets sold. And for the adults 215 dollars as well. to know this, I looked up multiples of them both. and 215 was the common one. So 215 adult tickets were sold and 215 student tickets were sold
Let X be chickens
Let Y be pigs,
then x+y=13
the animals have 2x+4y legs,
so 2x+4y=40
The system of the equations
[X+y=13
[2x+4y=40
Divide the second equation by 2
[x+y=13
[x+2y=20
subtract the first equation from the second one
y=20-13
y-7 pigs
substitute y=7 into the first equation
x+7=13
x=13-7
x=6 chickens
Answer:
2/π ≈ 0.637 m/s
Step-by-step explanation:
The rate of change of area with respect to time is ...
A = πr²
dA/dt = 2πr·dr/dt
Filling in given values in the above equations, we can find r and dr/dt.
25π = πr² ⇒ r = 5
20 = 2π·5·dr/dt
dr/dt = 20/(10π) = 2/π . . . . meters per second
The radius is increasing at the rate of 2/π ≈ 0.637 meters per second.
Answer:
b and d
Step-by-step explanation:
