Answer:
(x,y) = (6,4)
Step-by-step explanation:
-x+3y=6
x+3y =18
using elimination method
eliminate 1 variable, by adding equations
add the equations vertically
6y = 24
divide by 6 on both sides
6y/6 = 24/6
y = 4
NOT DONE YET!
substitute the y value
-x + 3(4) = 6
x = 6
(x,y) = (6,4)
CHECK:
-6 + 3(4) = 6
6 + 3(4) = 18
6 = 6
18 = 18
Answer:
x^3+3x^2+9x+27
Step-by-step explanation:
_____
The factoring of the difference of squares is used (twice):
a² -b² = (a -b)(a +b)
The compound interest formula is
FV=P(1+(r/n))^n*t
FV= future value
P= principal or amount of $ deposited
r= annual interest rate in decimal form
n= number of times compounded per year
t= time in years
Therefore 8000(1+(.12/12))^12*7 which equals $18453.78
Answer:
We are 95% sure that the true proportion of all residents of the town who approve of the proposal is between 0.361 and 0.579.
Step-by-step explanation:
x% confidence interval of a sample between a and b.
What is the interpretation?
The interpretation is that we are x% sure that the true population proportion is between a and b.
In this problem:
The 95 percent confidence interval to estimate the proportion of all residents of the town who approve of the proposal was calculated to be (0.361,0.579).
Interpretation:
We are 95% sure that the true proportion of all residents of the town who approve of the proposal is between 0.361 and 0.579.