Which number means the same as 2,000,000,000 70,000,000 6,000,000 300,000 40,000 2,000 100 10 7?
ale4655 [162]
The answer is b because 2,000,000,000
70,000,000
6,000,000
300,000
40,000
2,000
100
10
7
Use the depreciation formula.
Where 'P' is the principal amount, 'R' is the rate, and 'n' is the time in years. Plug in what we know:
Divide:
Subtract:
Simplify the exponent:
Multiply:
A signle system of linear equations has infinitely many solutions.
Two identical systems of linear equations have infinitely many solutions.
Two systems of linear equations has just one solution.
Two systems of <em>parallel</em> linear equations will has no solutions.
We have two systems of linear equations.
Let's see if they are parallel.
Parallel lines have the same slope.
We'll see if they do by converting to slope-intercept form.
(this will also let us know if they are identical)
1st Eqn.
3x - 9y = 0
Keep y on the left, x and the constant on the right...
-9y = -3x + 0
Divide by the y coefficient.
y = 1/3x + 0
2nd Eqn.
-x + 3y = -3
Keep y on the left, x and the constant on the right...
3y = x - 3
Divide by the y coefficient.
y = 1/3x - 3
As you can see, the two equations have the same slope! (1/3)
Because of this, they are parallel.
And they are not identical because the y-intercepts are different.
There are no solutions to this system of equations.
310 - 30w would be an expression for this problem
