Answer:
Step-by-step explanation:
A = pi*r^2
We first plug in 25 for A
25 = pi * r^2
Solve
We can then plug in r for circumference formula
C = 2pi * r
or 17.72
50 is in the tents place while 5000 is in the hundred place
the first five only has one zero so it is in the tens place. and the other five is in the thousand place because it has three zeros
Answer:
12x - 9y
Step-by-step explanation:
According to the distributive property:
3(4x - 3y) =
3*4x - 3*3y =
12x - 9y
Answer:
y = 2
Step-by-step explanation:
from the question which says that y is directly proportional to the positive square root of x can be expressed mathematically by saying
y ∝ √x
y = k√x..................................................... where k is the constant of proportionality.
y = 12, x = 9 , k = ?
from
y = k√x
12 = k√9
12 =3k
divide both sides by the coefficient of k which is 3
12/3 = 3k/3
4 = k
therefore K = 3
now, to find the value of y when x = 1/4
from y = k√x
y = 4√1/4
y = 4 × 1/2
y = 2
therefore the value of y when x = 1/4 in this expression y = k√x is 2