What is 5x -2=38
A 36
B 8
C 7
D 13

Answers

Answer 1

Answer: move constant over (5x=38+2), combine terms (5x=40), divide both sides by 5 (x=8)

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Factor completely x2 + 16.(x + 4)(x + 4) (x + 4)(x − 4) Prime (x − 4)(x − 4)

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5 divided by 1/2

Answers

The answer is 10. I know because I did the (multiplication) division.

When dividing fractions, you're actually multiplying the first number by the reciprocal(the number you get when you switch the numerator and denominator) of the second number. Your original equation looks like this:

5÷1/2

The first thing you want to do is find the reciprocal of your second number. In 1/2, the numerator is one and the denominator is two. When you switch the numerator and denominator, you get this:

2/1

Now two is the numerator and one is the denominator.
Next you will multiply 5 by 2/1 (2/1 simplifies to 2)

5*2=10

And there's your answer.

What’s the answer for b. Please help this is due in a couple hours!!

Answers

Answer:4, -28, and -5

Step-by-step explanation:

Simply you input 3 for x in the equation, so 4(3)-8

12-8= 4

Next is -5 so again 4(-5)-8

-20-8=-28

Lastly 3/4 so 4(3/4)-8

3-8=-5

Which of the following types of statement cannot be used to explain the steps of a proof? Check all that apply. A.Postulate B.Guess C.Conjecture D.Theorem

Answers

Answer:

Guess and Conjecture

Step-by-step explanation:

Conjecture is simply an opinion gotten from an incomplete information .Fro example. 10 boys selected from Nigeria were served pizza. None of them ate pizza.

it is a conjecture to conclude that all the males in Nigeria do not eat pizza, because the information is incomplete

Guess is almost similar to conjecture. It is conclusion from incomplete information. It is based on one's personal opinion. Guess can be true or false. it is underprobaility and hence cant be banked upon to explain a proof.

Answer:

guess, conjecture

Step-by-step explanation:

A car insurance company has determined that 7% of all drivers were involved in an accident last year. If 11 drivers are selected at random, what is the probability that 3 or more were involved in an accident last year?

Answers

Using the binomial distribution, it is found that there is a 0.0369 = 3.69% probability that 3 or more were involved in an accident last year.

For each driver, there are only two possible outcomes, either they were involved in an accident, or they were not. The probability of a driver being involved in an accident is independent of any other driver, hence, the binomial distribution is used to solve this question.

Binomial probability distribution

$P(X = x) = C_(n,x).p^(x).(1-p)^(n-x)$

$C_(n,x) = (n!)/(x!(n-x)!)$

The parameters are:

x is the number of successes.

n is the number of trials.

p is the probability of a success on a single trial.

In this problem:

7% of all drivers were involved in an accident last year, hence $p = 0.07$ .

11 drivers are selected at random, hence $n = 11$ .

The probability is:

$P(X \geq 3) = 1 - P(X < 3)$

In which:

$P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2)$

Then

$P(X = x) = C_(n,x).p^(x).(1-p)^(n-x)$

$P(X = 0) = C_(11,0).(0.07)^(0).(0.93)^(11) = 0.4501$

$P(X = 1) = C_(11,1).(0.07)^(1).(0.93)^(10) = 0.3727$

$P(X = 2) = C_(11,2).(0.07)^(2).(0.93)^(9) = 0.1403$

$P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2) = 0.4501 + 0.3727 + 0.1403 = 0.9631$

$P(X \geq 3) = 1 - P(X < 3) = 1 - 0.9631 = 0.0369$

0.0369 = 3.69% probability that 3 or more were involved in an accident last year.

To learn more about the binomial distribution, you can check brainly.com/question/24863377

Answer:

Therefore the probability that 3 or more were involved in an accident last year is 0.376.

Step-by-step explanation:

Binomial distribution:

A discrete random variable X having the set {0,1,2.....,n} as the spectrum, is said to have binomial distribution with parameter n= the number of trial and p = probability of getting successes in one trial if the p.m.f of X is give by

$P(X=x)=C(n,x)p^x(1-p)^(n-x)$ for x=0,1,2,....,n

=0 elsewhere

where $C(n,x)= (n!)/(x!(n-x)!)$ , n is a positive integer and 0<p<1.

Given that,

7% of all drivers were involved in an accident last year that was determined by a car insurance company.

p= 7%=0.07, n=11, x=3

P(X≥3)

= 1-P(X≤2)

= 1- P(X=0)-P(X=1)-P(X=2)

$=1- C(11,0)(0.07)^0(1-0.07)^(11)- C(11,1)(0.07)^1(1-0.07)^(10)- C(11,2)(0.07)^2(1-0.07)^(9)$

$=1- C(11,0)(0.07)^0(0.93)^(11)- C(11,1)(0.07)^1(0.93)^(10)- C(11,2)(0.07)^2(0.93)^(9)$

=1-0.624

≈0.376

Therefore the probability that 3 or more were involved in an accident last year is 0.376.

At a candy store, Erika bought 3 kilograms of cinnamon red hots and 1 kilogram of gummy bears for $21.00. Meanwhile, Irene bought 3 kilograms of cinnamon red hots and 3 kilograms of gummy bears for $39.00. What is the cost of one kilogram of each type of candy?

Answers

Taking the difference of the both you can see that 2 kg of gummy bears would cost $18. So each kg of gummy bear is $9. Now subtract $9 from what Erika bought, and 3 kg of red hots are $12. So each kg of red hots are $4.

Expand the following 4/5 (20x - 10)