The first digit could be any of these: 1, 2, 3, 4, 5, 6, 7, 8, 9
There are 9 choices, and only one is 1, so, the probability is 1/9
The second digit could be these(because the number is even): 2, 4, 6, 8
There are 4 choices, and only one is 8, so the probability is 1/4
Multiply the fractions:
1/9*1/4=1/36
The probability of his house number being 18 is 1/36
Good luck!
Answer:
Choice c.
Step-by-step explanation:
The domain of a rational function is found where the denominator of the fraction is equal to 0. These are the values that are NOT allowed. We have to factor the denominator completely to find these values that make the denominator equal 0. In other words, our denominator right now is:
we set each factor equal to 0:
x = 0 or
The left side of that quadratic is the difference of perfect squares, so it factors into the 2 binomials:
(x + 4)(x - 4)
Setting each of those equal to 0 we can solve for the values of x that are not allowed:
If x + 4 = 0, then
x ≠ 4.
If x - 4 = 0, then
x ≠ -4
So the domain for this rational function is:
{x I x ≠ ±4, x ≠ 0},
which is c.
First find the x and y values because where the lines will intersect, they share the point of the intersection so they will share the x and y coordinates.
Rearrange equations
To cancel y, we must do equation 1 minus equation 2. Similarly:
So the x coordinate is 3.
The y coordinate can be found with substitution of x into one of the equations:
So where the two lines intersect is at the point (3, 7), which is the solution to the equations.
Answer:
40$
Step-by-step explanation:
55 %(100-45).........22$
100%........................x$
X=100 ×22:55
X=2200 :55
X=40 $