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Degger [83]
3 years ago
13

Find the following product (x+3)(x-4)

Mathematics
2 answers:
egoroff_w [7]3 years ago
8 0
X^2-x-12 is the anwer
Ivahew [28]3 years ago
5 0

You must to the foil method, first, outer, inner, and last

(x+3)(x-4)

x^2-4x+3x-12

Simplify

x^2-x-12

You might be interested in
The probability that a grader will make a marking error on any particular question of a multiple-choice exam is 0.15. If there a
sashaice [31]

Answer:

P(X=0)=(10C10)(0.15)^{0} (1-0.15)^{10-0}=0.1969

P(X \geq 1)= 1-P(X

P(X=0)=(nCn)(p)^{0} (1-p)^{n-0}=(1-p)^n

P(X \geq 1)= 1-P(X

Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

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".

The probability mass function for the Binomial distribution is given as:  

P(X)=(nCx)(p)^x (1-p)^{n-x}  

Where (nCx) means combinatory and it's given by this formula:  

nCx=\frac{n!}{(n-x)! x!}  

The complement rule is a theorem that provides a connection between the probability of an event and the probability of the complement of the event. Lat A the event of interest and A' the complement. The rule is defined by: P(A)+P(A') =1

Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=10, p=0.15)

what is the probability that no errors are made?

For this case means that all the questions were correct so we want this probability:

P(X=0)=(10C10)(0.15)^{0} (1-0.15)^{10-0}=0.1969

what is the probability that at least one error made?

For this case we want this probability:

P(X \geq 1)

And we can use the complement rule:

P(X \geq 1)= 1-P(X

If there are n questions and the probability of a marking error is p rather than 0.15, give expressions for the probabilities of no errors  and at least one error

P(X=0)=(nCn)(p)^{0} (1-p)^{n-0}=(1-p)^n

P(X \geq 1)= 1-P(X

8 0
3 years ago
Simplify 3/5-6i<br> A.15+18i/61<br> B.-15+18i/61<br> C.3i/6+5i<br> D.15+18i/-11
GrogVix [38]

Answer:

15/61+18/61i

Step-by-step explanation:

6 0
3 years ago
Do circumstance of a circle with 17ft
olchik [2.2K]

Answer:

The circumference and area of a circle with a 17 ft diameter are:

C = 53.4 ft

A = 227 ft2

5 0
3 years ago
0= -16t^2 + 98 solve for t​ round to the nearest tenth if needed
Lunna [17]

Answer:

t = 7 • ± √2 = ± 9.8995

Step-by-step explanation:

8 0
3 years ago
If your phone Is on 100 percent battery, and you drain 45 percent of it, then charge 22 percent more, how much battery do you ha
baherus [9]
100-45+22= 77
you will have 77 percent of battery on your phone
5 0
3 years ago
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