Soo lets take anna=2a sun=2a and amanda=a
2a+2a+a=45
5a=45
a=45/5
a=9
then anna and sun=18 and amanda=9
and if we compare the diff annas dollars from attachment and the work shown above = 18-15=3
soo the answer should be three
Answer:
is the solution set.
Step-by-step explanation:
Divide eqn(2) by 3.
Hence both are the same lines.
if where be any point on real line iR.
from eqn (1)
Hence solution set is
d
^3
+
d^
2
+
12
d
+
18
Step-by-step explanation:
Answer: The original price of brownie was $2.1 each.
Step-by-step explanation:
since we have given that
Let the original price will be x
Number of brownie purchased = 8
According to question , each brownie costs $0.20 less than the original price.
So, it becomes
Hence, the original price of brownie was $2.1 each.
Answer:
Step-by-step explanation:
Before we even begin it would be very helpful to draw out a simple layout of the circuit. Then we go ahead and apply kirchoffs second law(sum of voltages around a loop must be zero) on the circuit and we obtain the following differential equation,
where V is the electromotive force applied to the LR series circuit, Ldi/dt is the voltage drop across the inductor and Ri is the voltage drop across the resistor. we can re write the equation as,
Then we first solve for the homogeneous part given by,
we obtain,
This is only the solution to the homogeneous part, The final solution would be given by,
where c is some constant, we added this because the right side of the primary differential equation has a constant term given by V/R. We put this in the main differential equation and obtain the value of c as c=V/R by comparing the constants on both sides.if we put in our initial condition of i(0)=0, we obtain , so the overall equation becomes,
where if we just plug in the values given in the question we obtain the answer given below,