Answer:
Below is a reference sheet.
Answer:
The best conclusion is that we are 90% that the true population proportion of Republicans that voted for Mitt Romney is between 0.7273 and 0.8106.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
In this question:
The 90% confidence interval for the proportion of Republican voters that had voted for Mitt Romney is (0.7273, 0.8106). The best conclusion is that we are 90% that the true population proportion of Republicans that voted for Mitt Romney is between 0.7273 and 0.8106.
Simplifying
X2 + -6xy + -12 = 0
Reorder the terms:
-12 + X2 + -6xy = 0
Solving
-12 + X2 + -6xy = 0
Solving for variable 'X'.
Move all terms containing X to the left, all other terms to the right.
Add '12' to each side of the equation.
-12 + X2 + 12 + -6xy = 0 + 12
Reorder the terms:
-12 + 12 + X2 + -6xy = 0 + 12
Combine like terms: -12 + 12 = 0
0 + X2 + -6xy = 0 + 12
X2 + -6xy = 0 + 12
Combine like terms: 0 + 12 = 12
X2 + -6xy = 12
Add '6xy' to each side of the equation.
X2 + -6xy + 6xy = 12 + 6xy
Combine like terms: -6xy + 6xy = 0
X2 + 0 = 12 + 6xy
X2 = 12 + 6xy
Simplifying
X2 = 12 + 6xy
Reorder the terms:
-12 + X2 + -6xy = 12 + 6xy + -12 + -6xy
Reorder the terms:
-12 + X2 + -6xy = 12 + -12 + 6xy + -6xy
Combine like terms: 12 + -12 = 0
-12 + X2 + -6xy = 0 + 6xy + -6xy
-12 + X2 + -6xy = 6xy + -6xy
Combine like terms: 6xy + -6xy = 0
-12 + X2 + -6xy = 0
The solution to this equation could not be determined.
Answer:
c or d
Step-by-step explanation:
not sure witch
Answer:
a=4
b=-6
Step-by-step explanation:
3(2ax-10)=24x+5b
6ax - 30 = 24x + 5b
6a = 24
a = 4
5b = -30
b = -6
check: 3(2*4*x - 10) = 24x - 30 = 24x + 5 * (-6) = 24x - 30