Need an explanation, thx

1. 9.48

2. 11.1

3. 5.65

4. 26.45 or 26.4

Answer:

x(x²+x+1)

Step-by-step explanation:

im not surewhat answer u want but take note this is FACTORIZATION

Answer:

CCC

Step-by-step explanation:

Answer:

81

Step-by-step explanation:

a p e x (just took the quiz)

Answer:

In triangle ABC,

What are the angles?

the angles are A, B and C

What is the sum of all three angles in a triangle?

A + B + C = 180°

the measure of angle B is three times that of angle A.

What is angle B equal to, mathematically?

B is equal to 3A

the angles are now A, 3A and C

The measure of angle C is 20 degrees more than that of angle A.

What is angle C equal to, algebraically?

C is equal to A+20

the angles are now A, 3A, and A+20

How do you find the angle measures?

What is the sum of all angles in a triangle?

A + B + C = 180°

Write it again, this time with B = 3A, and C = A+20

A + (3A) + (A+20) = 180°

Simplify:

A + 3A + A + 20 = 180°

5A + 20 = 180°

Solve for A and you have angle A, then reread the above to get B and C.

I’m going to let you finish it from here.

What did you get?

Be sure you double check your answer.

Do your three angles add up to 180?

Is B triple the value of A?

Is C 20 more than A?

Step-by-step explanation:

hopefully this helps

Answer:

His answer was correct:

(200*0.09)=18

18*16=288

200+288=488

Answer: 93

suppose: the grade we need on the next exam is x (x > 0)

to have an average of 90, we have the equation:

\(\frac{85+88+94+x}{4}=90\\\\<=>267+x=360\\\\<=>x=360-267\\\\<=>x=93\)

so the grade we need on the next exam is 93

Step-by-step explanation:

\(suppose: the grade we need on the next exam is x (x > 0)

to have an average of 90, we have the equation:

\begin{gathered}\frac{85+88+94+x}{4}=90\\\\ < = > 267+x=360\\\\ < = > x=360-267\\\\ < = > x=93\end{gathered}485+88+94+x=90<=>267+x=360<=>x=360−267<=>x=93

so the grade we need on the next exam

\)

Answer:

ABC = 113°

Step-by-step explanation:

If ABD is 70° and DBC is 43°

ABC is 70°+43° = 113°

Answer:

1, 3, 7

Step-by-step explanation:

A rational number can be written as a ratio or fraction.

1) I wasn't able to determine a fraction for what I'm assuming you meant by 0.878787878787 going on and on so it must be irrational

2) 3.624 can be written as 3 78/125

3) The square root of two is irrational

4) 0.6666666 going on and on can be written as 1/3

5) -5.6 can be written as a fraction too

6) 1/3 is already a fraction

7) Pi is irrational

Hope that helps!

a. The probability that the system will operate as shown is approximately 0.6141.

b. Probability ≈ 0.6141The probability remains the same as in the previous case, which is approximately 0.6141.

c. The probability that the system will operate with each component having a backup with a probability of 0.85 and a switch that is 90% reliable is approximately 0.6485.

a. To find the probability that the system will operate as shown, we multiply the probabilities of each component. Since the system is shown to have three components with a probability of 0.85 each, we can calculate:

Probability = 0.85 × 0.85 × 0.85

Probability ≈ 0.6141

The probability that the system will operate as shown is approximately 0.6141.

b. In this case, each system component has a backup with a probability of 0.85 and a switch that is 100% reliable. Since the backup has a probability of 0.85, and the switch is 100% reliable (probability = 1), we can calculate the probability as:

Probability = 0.85 × 0.85 × 0.85

Probability ≈ 0.6141The probability remains the same as in the previous case, which is approximately 0.6141.

c. In this scenario, each system component has a backup with a probability of 0.85, but the switch is 90% reliable (probability = 0.90). We can calculate the probability as:

Probability = 0.85 × 0.90 × 0.85

Probability ≈ 0.6485

The probability that the system will operate with each component having a backup with a probability of 0.85 and a switch that is 90% reliable is approximately 0.6485.

For more such questions on Probability

https://brainly.com/question/30390037

#SPJ8

Answer:

\(z = w - 3x + 2y\)

Step-by-step explanation:

\(3x - 2y + z = w\)

\(3x - 2y + z - 3x + 2y = w - 3x + 2y\)

\( - 2y + z + 2y = w - 3x + 2y\)

\(z = w - 3x + 2y\)

\(\boxed{\green{z = w - 3x + 2y}}\)

The system of equations given, kx + 9y = 1 and 5x - 3y = 2, will have a unique solution for all values of k except k = -3.

To determine the values of k for which the system has a unique solution, we need to consider the coefficients of x and y in the equations. The system will have a unique solution if and only if the two lines represented by the equations intersect at a single point. This occurs when the slopes of the lines are not equal.

In the given system, the coefficient of x in the first equation is k, and the coefficient of x in the second equation is 5. These coefficients are equal when k = 5. Therefore, for all values of k except k = -3, the system will have a unique solution. Thus, the correct answer is option (C): All k ≠ -3.


To learn more about equation click here: brainly.com/question/29538993


#SPJ11


Complete question: Consider the system of equations: kx + 9y = 1 and 5x-3y=2. For which values of k does the system above have a unique solution? (A) All k #0 (B) All k #3 (C) All k + -3 (D) All k +1 (E) All

Answer: p=8

Step-by-step explanation:

while shopping for clothes, Daniel spent $26 less than 2 times what curtis spent. Daniel spent $10. write and solve an equation to find how much curtis spent. let x represent how much curtis spent​

Let

x ------> amount that Curtis spent

we have that

10=2x-26 ------> equation that represent this situation

solve for x

2x=10+26

2x=36

x=$18

therefore

Answer:

6x-6

Step-by-step explanation:

(2x+6)+(4x-12)=2x+6+4x-12

                      =6x-6

To calculate the value of the test statistic, we need to use the sample results provided: d-bar = 6.9, sD = 7.8, and n = 10. The value of the test statistic is approximately 1.983.

Given:

Sample mean difference (d-bar) = 6.9

Sample standard deviation of the differences (sD) = 7.8

Sample size (n) = 10

To calculate the test statistic, we can use the formula for the t-statistic:

t = (d-bar - μD) / (sD / sqrt(n))

where d-bar is the sample mean difference, μD is the hypothesized mean difference under the null hypothesis, sD is the sample standard deviation of the differences, and n is the sample size.

In this case, the null hypothesis (H0) states that μD is less than or equal to 2. Since the alternative hypothesis (HA) is μD > 2, this is a one-tailed test.

Plugging in the values into the formula:

t = (6.9 - 2) / (7.8 / sqrt(10))

t = 4.9 / (7.8 / 3.162)

t = 4.9 / 2.471

t ≈ 1.983

Therefore, the value of the test statistic is approximately 1.983.

To learn more about standard deviation click here, brainly.com/question/29115611

#SPJ11

Using the concept of conditional probability and the conditions provided, The answer is \(\frac {p^2}{2pq}\) .

Probability is a measure of the likelihood of an event occurring. It is a number between 0 and 1, where 0 represents an impossible event and 1 represents a certain event. Probabilities can be calculated using the ratio of the number of favorable outcomes to the total number of possible outcomes. It helps us to understand the uncertainty of events.

A false positive result is when a test indicates that a particular condition or attribute is present, when in reality it is not. For example, in medical testing, a false positive result would occur when a test for a disease returns a positive result but the person being tested does not actually have the disease. False positives can have serious consequences, as they can lead to unnecessary treatments, further testing, and anxiety for the person being tested.

p=probability of occurrence

q=1-p

P(false positive for both subjects | false positive for one subject) = P(false positive for both subjects and false positive for one subject) / P(false positive for one subject)

P(false positive for both subjects | false positive for one subject) = p^2 / (2pq)

To learn more about probability visit:

https://brainly.com/question/30034780

#SPJ4

Answer:

121.7

Step-by-step explanation:

Use the .746 to round to the nearest decimal place.

To do this you look to the value of the number next to the .7

If it is 5 or higher you round upwards

If it is 4 or lower you round downwards or leave as is.

Therefore .746 rounds to .7

Your answer is 121.7

The calculated volume of the cone is 94.29 cubic cm

From the question, we have the following parameters that can be used in our computation:

Base diameter = 6 cm

Height = 10 cm

Using the above as a guide, we have the following:

r = 6/2 = 3

h = 10

So, we have

V = 1/3πr²h

Substitute the known values in the above equation, so, we have the following representation

V = 1/3 * 22/7 * 3² * 10

Evaluate

V = 94.29

Hence, the volume is 94.29 cubic cm

Read more about volume at

brainly.com/question/1972490

#SPJ1

Answer:

the number is 20

Step-by-step explanation:

let 'n' represent the number

2n + 9 = 49

2n = 40

n = 40/2 = 20

The probability that a randomly selected junior biology major has taken either a statistics or a computer course is 0.68

To find the probability that a randomly selected junior biology major has taken either a statistics or a computer course (or both), we'll use the formula:

P(A or B) = P(A) + P(B) - P(A and B)

Where:
- P(A) is the probability of having taken a statistics course (52% or 0.52)
- P(B) is the probability of having taken a computer course (23% or 0.23)
- P(A and B) is the probability of having taken both courses (7% or 0.07)

Now, plug in the values:

P(A or B) = 0.52 + 0.23 - 0.07
P(A or B) = 0.68

So, the probability that a randomly selected junior biology major has taken either a statistics or a computer course (or both) is 0.68, or 68%.

Learn more about Probability:

brainly.com/question/11234923

#SPJ11

The estimated change in yy using differentials is -0.00679. This means that if xx is increased by 0.005, then yy is estimated to decrease by 0.00679. The differential of yy is dy=-5sin(5x)dxdy=−5sin⁡(5x)dx. We are given that y=cos(5x)=π/30y=cos⁡(5x)=π/30 and x=0.055x=0.055.

We want to estimate ΔyΔy, which is the change in yy when xx is increased by 0.005. We can use the differential to estimate ΔyΔy as follows:

Δy≈dy≈dy=-5sin(5x)dx

Plugging in the values of y, x, and dxdx, we get:

Δy≈-5sin(5(0.055))(0.005)≈-0.00679

Therefore, the estimated change in yy using differentials is -0.00679.

To learn more about differential click here : brainly.com/question/31383100

#SPJ11

0.368 .

The probability that a random variable x is exponentially distributed and less than 45 minutes,

given that the average value is 45 minutes, is 0.368.

This can be calculated by taking the negative of the natural logarithm of 1/2 (i.e. -ln(0.5)) and dividing it by the average value of 45 minutes.

The result, -ln(0.5)/45, equals 0.368, rounded to three decimal places.

Learn more about natural logarithm

brainly.com/question/29195789

#SPJ11

Answer:

Believe it or not, it would be 60 degrees.

Step-by-step explanation:

Here, we are working with ALTERNATE INTERIOR ANGLES. Since we know the beam supports for the top and bottom are parallel, 1&2 will be the same angle measurement.

Here is a diagram of an example of alternate interior angles, where m1=m2.

Answer:

Step-by-step explanation:

The cost C per passenger is given by the equation C(x) = 200 + 10x, where x is the ground speed. To find the cost, we substitute values into the equation.

(a) When the ground speed is 360 miles per hour, we have C(360) = 200 + 10(360) = 200 + 3600 = 3800 dollars per passenger.

When the ground speed is 480 miles per hour, we have C(480) = 200 + 10(480) = 200 + 4800 = 5000 dollars per passenger.

(b) The domain of C represents the valid input values for x, which in this case is the ground speed. Since the airspeed is given as 500 miles per hour, the ground speed must be greater than or equal to 0. Therefore, the domain of C is x ≥ 0.

(c) The graph of the function C(x) = 200 + 10x can be plotted on a graphing calculator to visualize the relationship between ground speed and cost per passenger.

(d) Creating a table with TblStart = 0 and ΔTbl = 50 allows us to generate a set of values for the ground speed (x) and the corresponding cost (C). The table can be used to observe the cost per passenger at different ground speeds.

(e) To determine the ground speed that minimizes the cost per passenger, we can examine the table or graph and identify the value of x where the cost C(x) is the lowest. By looking for the minimum value of C in the table or finding the lowest point on the graph, we can determine the nearest 50 miles per hour that correspond to the ground speed minimizing the cost per passenger.

Learn more about miles per hour here:

https://brainly.com/question/31684642

#SPJ11

Answer:

Sister = 15 years old

Brother = 12 years old

Step-by-step explanation:

Right now, if the brother is B years old and the sister is S years old, B = (4/5)S because the ratio from brother to sister is 4:5, so if one unit is X, B = 4X and S = 5X

Three years ago, the brother was B-3 years old and the sister was S-3 years old. Keeping one unit as X, we have

B = 3X

S = 4X

B-3 = (3/4)(S-3)

Therefore, we have a system of equations

B = (4/5)S

B-3 = (3/4)(S-3)

Substitute (4/5)S for B into the second equation to only have one variable

(4/5)S - 3 = (3/4)(S-3)

(4/5)S - 3 = (3/4)S - 9/4

add 3 to both sides and subtract (3/4)S from both sides to isolate the variable and its coefficient

(1/20)S = 3/4

multiply both sides by 20 to isolate the S

S = 15

B = (4/5)S = 12

The measure of the m∠IUV using the addition postulate is equivalent to 82 degrees

A line is defined as the shortest distance between two points while an angle is the point where two lines meet.

Given the following measure of angles

m∠TUI = 65° and

m∠TUV = 147°

Required angle

m∠IUV

Using the addition postulate below

m∠TUV = m∠TUI + m∠IUV

Substitute the given parameters

147 = 65 + m∠IUV

m∠IUV = 147 - 65

m∠IUV  = 82 degrees

Hence the measure of the m∠IUV using the addition postulate is equivalent to 82 degrees

Learn more on addition postulate here: https://brainly.com/question/2134445

#SPJ1

Answer:

y = 3x+6

Step-by-step explanation:

refer to the picture

Answer:

y = 3x + 6

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 3x + 2 ← is in slope- intercept form

with slope m = 3

Parallel lines have equal slopes, so slope of parallel line is 3

Expressing the equation in point- slope form with m = 3 , (x₁, y₁ ) = (1, 9)

y - 9 = 3(x - 1)

y - 9 = 3x - 3 ( add 9 to both sides )

y = 3x + 6 ← in slope- intercept form

Answer: 6.56

Step-by-step explanation:

Here are the detailed math steps we use to convert 6 5/9 mixed number to decimal form:

6 × 9 = 54

54 + 5 = 59

59 ÷ 9 = 6.555556

That's it folks! The answer to 6 5/9 in decimal form is displayed below:

6 5/9 ≈ 6.56