Answer: the hourly cost of renting a power washer is $5
the hourly cost of renting a generator is $10
Step-by-step explanation:
Let x represent the hourly cost of renting a power washer.
Let y represent the hourly cost of renting a generator.
On his first job, he used each piece of equipment for 6 hours which cost $90. This means that
6x + 6y = 90 - - - - - - - - 1
On his second job, he used the power washer for 4 hours and the generator for 8 which cost $100. This means that
4x + 8y = 100 - - - - - - - - - - 2
Multiplying equation 1 by 4 and equation 2 by 6, it becomes
24x + 24y = 360
24x + 48y = 600
Subtracting, it becomes
- 24y = - 240
y = - 240/-24 = 10
Substituting y = 10 into equation 1, it becomes
6x + 6 × 10 = 90
6x + 60 = 90
6x = 90 - 60 = 30
x = 30/6 = 5
8 2/3 - 7 3/4= X
8 ?/12- 7 ?/12=X
8 8/12- 7 9/12
104/12- 93/12
104/12-93/12=11/12
7 3/4+11/12=8 2/3
X=11/12
It is airoplane and ambulance
Answer:
The distribution is
b) skewed.
The sum of the probabilities is:
1
Step-by-step explanation:
In a binomial distribution, p represents the probability of success. Success in the sense that the event of interest happens. In the model presented, the probability of success p is 0.4 since we are informed that 40% of adults watch a particular television show.
The next quantity of significance in a binomial model is the number of independent trials, n. In our case there are 6 independent trials since we are told that 6 adults were selected at random. If we let the random variable K denote the number of adults out of the 6 who watch the television show, then K is a binomial random variable with parameters;
n = 6 and p = 0.4
A binomial distribution is only symmetric when either p is 0.5 or n is large. In the presented scenario none of this conditions is met since p is 0.4 while n is just 6 which is relatively small. Thus we conclude that the distribution is not symmetric but rather skewed.
The sum of the probabilities is any discrete probability distribution such as the bernoulli, binomial, negative binomial, poisson, or the geometric distribution is always equal to 1. That's a rule of thumb.
(–19, 55)
Replacing y in the second equation gives;
5x+2(-3x-2)=15
5x-6x-4=15
-x-4=15
-x=19
x=-19
y=-3(-19)-2
y=57-2
y=55
(-19, 55)