Answer:
The solution is:
Step-by-step explanation:
We have the following equations
To solve the system multiply by 3 the second equation and add it to the first equation
---------------------------------------
Now substitute the value of x in any of the two equations and solve for y
The solution is:
The equation is
R=100(1/2)^(d/5)
After one day the remaining is
R=100×(1÷2)^(1÷5)
R=87.06 remaining
It decreased by 12.94 (100−87.06)
So the daily percent of decreases is 12.94%
75 cm is the height. i added them, 40 and 25.
explaining:
Two and two-thirds of a day, but you should say three days.
The quadratic formula is the result of completing the square for ax^2+bx+c=0 when a,b, and c are unknown values. This result is:
x=(-b±√(b^2-4ac))/(2a), we have x^2-x-2=0 so
x=(1±√(1+8))/2
x=(1±√9)/2
x=(1±3)/2
x=-1 and 2