We will be using the fact that , where is the probability that the first bulb works and is the probability that the second bulb works.
The probability that the first bulb works is . However, when we take one out (given that the first bulb works) we now have 19 working bulbs and 4 bad ones. This means that the probability that the second bulb works is .
Now, we can find our final probability:
(X 3-y) (3+z)
That's the two polynomials
Answer:
Step-by-step explanation:
Standard form for equation of line: y = mx + c
where m = gradient or slope
c = y-intercept
From the question we know that,
x = 2
y = 3
m = - 0.5
We will substitute these values into the equation to find c.
3 = (-0.5)(2) + c
3 = - 1 + c
c = 3 + 1 = 4
Therefore the equation of this line is
Answer:
26.5 add all the areas
Step-by-step explanation:
hope you find this helpful
Answer:
30 inches
Step-by-step explanation:
As, the stability ball of Ana is congruent to the stability ball of Fredrick. This implies that the volume of both the balls will be same.
So, Volume of Ana's ball = Volume of Fredrick's ball = 4500 .
Now, the volume of a sphere is given by , where 'r' is the radius.
Substituting the value of the volume in this formula, we will obtain the radius.
i.e.
i.e.
i.e. r = 15 inches
As, diameter is the double of the radius.
So, diameter = 2×radius = 2×15 = 30 inches.
Hence, the diameter of Fredrick's ball the 30 inches.