Use substitution to solve. PLEASE HELP!

Mathematics

2 answers:

ikadub [295]3 years ago

7 0

Answer:

The answer is a because you substitute the numbers in and that is the correct equation brainliest please :)

Step-by-step explanation:

nordsb [41]3 years ago

4 0

Answ(2,4)

Step-by-step explanation:

You might be interested in

What is the answer for this question plz help

emmainna [20.7K]

So you swap sides and you have 3x=93 and then you divide 3 by 93 and you get x=31

6 0

2 years ago

If 90 percent of automobiles in Orange County have both headlights working, what is the probability that in a sample of eight au

Alex17521 [72]

Answer:

$P(X \geq 7) = P(X=7) +P(X=8)$

And we can find the individual probabilities using the probability mass function

$P(X=7)=(8C7)(0.9)^7 (1-0.9)^{8-7}=0.3826$

$P(X=8)=(8C8)(0.9)^8 (1-0.9)^{8-8}=0.4305$

And replacing we got:

$P(X \geq 7) = P(X=7) +P(X=8)=0.3826 +0.4305=0.8131$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest "number of automobiles with both headligths working", on this case we now that:

$X \sim Binom(n=8, p=0.9)$