3x + 2 ≥ 4x + 8 solve and graph the solution to the inequality

The total miles of the trip are 521.68 miles.

Addition in maths, a process of combining two or more numbers.

Given that, Rosie drives 317.88 miles before lunch and then  [tex]203\frac{4}{5}[/tex] miles before break,

Total miles = 317.88 +  [tex]203\frac{4}{5}[/tex] miles = 521.68 miles

Hence, The total miles of the trip are 521.68 miles.

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By solving a system of equations we will see that she sold 80 phones and 240 accessories.

Let's define the variables:

x = number of phones.

y = number of accessories.

We know that she makes $160 on commissions, and that she sold 3 times as many accessories as phones, so we can write the system of equations:

y = 3x

x*$8 + y*$4 = $160

To solve the system, we can replace the first equation into the second one.

x*$8 + (3x)*$4 = $160

x*$8 + x*$12 = $160

x*$20 =  $160

x  = $160/$20 = 80

She sold 80 phones, and the number of accessories is:

y = 3x

y = 3*80 = 240

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Yes, it would be unusual for a  500 adult Americans to result in 210 or more who believe marriage is obsolete. The probability value is 0.39 for adult Americans.  

We know very well that probability is defined as the ratio of number of favorable outcomes to the total number of outcomes.

We have given that 39% american adults women believes that marriage is now obsolete.

So,39% of 500 adult American women is =[(39/100)×500]

                                                                     =39×5=195

So,probability of adult women who believes marriage is obsolete is =(195/500)=0.39

Now, we need to check that whether 210 women believes marriage is obsolete or not.

So, number of favorable outcome is 210 and total number of outcomes=500.

Therefore, probability of adult women who believes marriage is obsolete is=(210/500)=0.42

Now,we can see that 195 women probability is lower than 210 women probability. It means that more number of women considered marriage is obsolete.

Hence, yes it is unusual and the  probability value of adult Americans is 0.39

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(Complete question) is:

would it be unusual for a random sample of 500 adult americans to result in 210 or more who believe marriage is obsolete?If so determine the probability, otherwise type 0 for this result NOT to be unusual

Using technology, the correlation coefficient is 0.997

We should know that correlation coefficient is a statistical model which is used to determine or measure the relationship between two variables.

The table is

                            x               y              x²            y²             xy

                          8              22             64          484            176

                         12              23            144          529            276

                         18             26             324         676           468

                         24             30            567         900         720

                          30           32              900        1024         960

                        32              33              1024     1089         1056

                         35             35             1225       1225         1225

                          37             36            1369        1369         1332

                          40             38           1600         1444         1520

    Total          236           275          7226         8740        7733

[tex]r= \frac{nExy)-(Ex)(Ey)}{\sqrt{[n(EX^{2}][nEy^{2}(Ey)^{2} } }[/tex]

applying the figures from the table we have

r=[tex]\frac{9*7733-(236)(275)}{\sqrt{[9*7226-55696][9*8740-75625]} }[/tex]

Simplifying the expression we have

r=[tex]\frac{4697}{\sqrt{28340830} }[/tex]

r=0.88

r=0.9 approximately

Therefore the correct answer is 0.997 which is the correlation coefficient.

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The rate of change of the perimeter is  4 in/sec .

In the question ,

it is given that ,

the length of the rectangle is [tex]=[/tex] 1 inch

the width of the rectangle is = 6 inch

the rate of increasing length is (dL/dt) = 4 in/sec

rate of shrinking width is (dW/dt) = -22 in/sec ,

We know that the perimeter of the rectangle is = 2(L + W) ,

that is , P = 2L + 2W ,

Differentiating perimeter with respect to time "t" ,

we get ,

dP/dt = 2 × ( dL/dt) + 2 × (dW/dt )

Substituting the values from above ,

we get ,

= 2 × (4) + 2 × (-2)

= 8 - 4

= 4

Therefore , the required rate of change is = 4 in/sec .

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The resulting value of the given indices expression is: [tex]\frac{1}{5x^{7/3}}[/tex]

A term's multiplicative history can be determined by an index, which is a discrete number. Indexes is the plural of index.

The exponentiation operator is the caret (). It is important to distinguish the exponent operator from the base-10 exponent sign. In a numeric literal, a base-10 exponent sign (scientific notation) can be represented by either an uppercase "E" or a lowercase "e."

[tex](125x^{7/3})^{-1/3}[/tex]

Using the indices law that states;

[tex](a^n)^m = a^{mn}[/tex]

Given,

[tex](125x^{7/3})^{-1/3}[/tex]

Since, [tex](125x^{7/3})^{-1/3}[/tex]= [tex][((5x)^3)^{7/3}]^{-1/3}[/tex]

= [tex][(5x)^7]^{-1/3}[/tex]

= [tex]5x^{-7/3}[/tex]

= [tex]\frac{1}{5x^{7/3}}[/tex]

Hence the resulting value of the given indices expression is: [tex]\frac{1}{5x^{7/3}}[/tex]

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Answer: -10

Step-by-step explanation:

Substitute the numbers in for the variables.

np + n = (2)(-6) + 2

-12 + 2

-10

The equations represent the given situation is:

2x - y = -6

3x - y = -5

where, x is the smaller number and y is the larger number.

Let the smaller number be x.

We have been given a number, y, is equal to twice the sum of a smaller number and 3

So, we get an equation,

y = 2(x + 3)

y = 2x + 6                        

2x - y = -6

The larger number is also equal to 5 more than 3 times the smaller number.

So, we get an equation,

y = 5 + 3x                        

3x - y = -5

Therefore, the equations represent the situation:

2x - y = -6

3x - y = -5

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a) Probability of exactly three boys is 0.3185

b) Probability of at least one boy is 0.9717

c) Probability of at least one girl is 0.9655

d) Probability of all of same sex is 0.06275

What is probability?

a) Probability of exactly three boys

Choose 3 out of 5 in C(5,3)=10 ways

So probability is:10*0.51^3*0.49^2

~0.3185

(b) Probability of at least one boy

p(at least one boy)=1-p( all girls)

=1-0.49^5

=0.9717

c) Probability of at least one girl

p(at least one girl)=1-p( all boys)

=1-0.51^5

=0.9655

d) Probability of all of same sex

p(all of same sex)=p(all boys)+p(all girls)=

0.51^5+0.49^5

=0.06275

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The value of the equation A = ( 6 3/4 ) / ( 4 1/2 ) is 3/2 or 1 1/2

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the first number be A = 6 3/4

A = 27/4

Let the second number be B = 4 1/2

B = 9/2

Now , the equation is C = A/B

The value of C = A / B

Substituting the values of A and B in the equation , we get

Value of C = ( 6 3/4 ) /  ( 4 1/2 )

Value of C = ( 27/4 ) / ( 9/2 )

Value of C = ( 27 / 9 ) / 2

Value of C = 3 / 2

Therefore , the value of C is 3/2 or 1 1/2

Hence , The value of the equation A = ( 6 3/4 ) / ( 4 1/2 ) is 3/2 or 1 1/2

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Answer: 270 I think

Step-by-step explanation:

try it you can get this right

The value of m and n from the obtained probability is equal to 3 and 14 respectively.

As given in the question,

Nine tiles numbered 1, 2, .....9

Number of odd numbered tiles are 1,3,5,7,9 = 5

Number of even numbered tiles are 2,4,6,8 = 4

Number of players =3

Possibility to choose 3 tiles by first player out of 9 tiles = ⁹C₃

                                                                                            = 84 ways

Possibility to choose 3 tiles by second player out of 6 tiles = ⁶C₃

                                                                                                 =20 ways

Possibility to choose 3 tiles by third player out of 3 tiles = ³C₃

                                                                                             = 1 way

Total number of ways = 84× 20 ×1

                                     = 1680

To have a sum of 3 tiles is odd number at least one tile should be odd.

Chances of first player all the 3 tiles are 0dd out of 5 = ⁵C₃

Next two players must 2 even tiles and 1 odd tile.= ²C₁

One player can be selected in ³C₁ way

Remaining 4 even tiles distributed equally = (4!)(2!)/ (2!)² ( 2!)

Number of favourable outcomes =  ⁵C₃ × ²C₁ ׳C₁  × (4!)(2!)/ (2!)² ( 2!)

                                                       = 10 × 2 × 3 × 6

                                                       = 360

Probability (m/n) =  360 /1680

                            = 3/14

m = 3 and n = 14.

Therefore, from the probability that all three players obtain an odd sum is m/n , the value m = 3 and n = 14.

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Given that the dividend is 15a²-a-28 and the divisor is 3a+4, the quotient will be 5a-7 and the remainder will be 0.

A multi-term algebraic statement is referred to as a polynomial. It contains exponents, coefficients, variables, constants, and arithmetic operators. It uses a polynomial long division algorithm to divide the polynomials. It is the long division technique in a more generalized form. In this method, a polynomial is divided by other polynomials of the same degree or lower. Synthetic division method is a simple and quick technique that is occasionally employed as well.

Here,

dividend=15a²-a-28

divisor=3a+4

remainder=0

15a²-a-28=(3a+4)(5a-7)

quotient=5a-7

The quotient will be 5a-7 and remainder will be 0 as dividend is 15a²-a-28 and divisor is 3a+4.

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The total cost of the set and the tax is 2653.6 dollars.

The Myer family purchased a bedroom set for $2,480.  The sales tax rate is  7 percent.

Therefore, the total cost of the set and the tax can be calculated as follows:

tax = 7% of 2480

tax = 7 / 100 × 2480

tax = 17360 / 100

tax = $173.6

Therefore, let's find the total cost of the set and tax.

total cost = 173.6 + 2480

total cost = 2653.6 dollars

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The output firm will get maximum profits when the quantity is 4 units and the company will charge a price of $15 for maximum profit.

The fixed cost of this facility is FC = $24. Also, the firm has constant marginal cost, MC = $3

Demand for the product that the firm produces is given by P = 27- 3Q.

The total cost is calculated by adding fixed cost and variable cost.

TC = FC + VC

Average total cost = total cost / quantity

Quantity  price (37 - 3Q) fixed cost variable cost  total cost average cost

1                27 - 3(1) = 24      24            3 (1)                 27             27

2               27 - 3(2) = 21      24            3(2) = 6           30            15

3                27 - 3(3) = 18      24            3(3) = 9           33            11

4               27 - 3(4) = 15       24           3(4) = 12          36             9

5               27 - 3(5) = 12       24           3(5) = 15          39            7.8

Upon analysing the table we can say that

B) the number of output units is 4

C) Maximum profit is when price is $15

Therefore, the maximum profit is when the output units is 4 and the company will charge a price of $15 for maximum profit.

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The year becomes 1993, when the newspaper circulation is closest to the average circulation.

Part a:

The function is n(x)=0.00792x^3−0.37x^2+3.557x+51.588

The formula for the average of the function is 1b−a∫baf(x)dx

The year 1986 corresponds to 6 and 2000 corresponds to 20 as x is the number of years since 1980.

Obtain the average:

1b−a∫baf(x)dx==≈1/20−6∫20-6[0.00792x^3−0.37x^2+3.557x+51.588]dx

1/14[0.00792x^4/4−0.37x^3/3+3.557x^2/2+51.588x]20-6

51.70094

Therefore, the average newspaper circulation from 1986 to 2000 was 51.70094.

Part b:

Now, the equation is obtained as

0.00792x^3−0.37x^2+3.557x+51.588=51.70094

0.00792x^3−0.37x^2+3.557x−0.11294=0

Obtain the value of x using an online graphing calculator as follows:

Thus, the value of x becomes 13.481

Hence, 1993 is the year of the closest average circulation

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Answer: 70%

Step-by-step explanation:

We want to finish each statement by analyzing the graph provided.

The function's y-intercept is y =2.

y = 3x+2 is the equation.

The line connects (0, 2) and (2, 6).

The earliest known attempt to the concept of function may be traced back to the works of Persian mathematicians Al-Biruni and Sharaf al-Din al-Tusi. Functions were initially the idealization of how a variable quantity depended on another quantity. The position of a planet, for example, is a function of time.

So, first, we need to find the y-intercept. We know that the y-intercept is the y-value at which the function intersects the y-axis, and we can see from the graph that the y-intercept is y = 2.

Then we'd like to see the line's equation.

Remember that y = ax + b is a generic line.

Where a denotes the slope and b the y-intercept, we may deduce:

y = ax + 2

We know that if a line passes through two points (x₁, y₁) and (x₂, y₂), then the slope is:

a=(y₂-y₁)/(x₂-x₁)

Given that the line passes through (0, 2) and (-2/3, 0), the slope is as follows:

a=(-2/3)/(-2)

a=1/3

The equation of the line is:

y =3x+2

And using that equation, we can show that the line does indeed pass through the points (0, 2) and (2, 6)

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Answer:2.25 gallons

Step-by-step explanation:

Answer:

Step-by-step explanation: 10.75

The true proportion of adults is in the interval 0.4026< P< 0.4594.

Here we have to estimate the true population of adults who would like to travel to outer space with 88% accuracy.

Data provided:

selected (x) = 329

Total(n) = 763

Sample proportion (p') = x/n

                                       = 329/ 763

                                       = 0.431

Critical z-value = 1.59

margin of error(E) = z[tex]\sqrt{p'( 1-p')/n}[/tex]

                             = 1.59 [tex]\sqrt{0.431(1-0.431) / 763}[/tex]

                             = 1.59 × 0.0179

                             = 0.0284

88% confidence interval is:

(p' ± E) = ( 0.431 ± 0.0284)

          = 0.4594 and 0.4026

Therefore the estimate is 0.4026< P< 0.4594.

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The first deal in which 1 can costs $0.055, is the best buy as it costs $0.020 less than the second deal in which 1 can costs $0.075.

Given, A Tomato juice 46 oz. Cans cost $2. 53

B Tomato juice 6-pack of 10 oz. Cans costs $4. 50

we have to find the best buy between the given two.

In first case,

46 cans cost $2.53

46 cans = $2.53

1 can = 2.53/46

1 can costs $0.055

In second case,

60 cans cost $4.50

60 cans = $4.50

1 can = 4.50/60

1 can costs $0.075

So, it is clear that first deal in which 1 can costs $0.055, is the best buy as it costs $0.020 less than the second deal in which 1 can costs $0.075.

Hence, the first deal in which 1 can costs $0.055, is the best buy as it costs $0.020 less than the second deal in which 1 can costs $0.075.

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By using the concept of permutation, it can be calculated that

Fraction of seven number combinations formed used the numbers of the pattern 3795523 will have the two 3's always together = [tex]\frac{360}{1260}[/tex]

                                                                                          = [tex]\frac{2}{7}[/tex]

What is permutation?

Permutation is the arrangement technique that determines how many possible arrangement that can be made in a set where the order of arrangement matters.

Here, concept of permutation is used

Number of 7 number combinations that can be formed using the number 3795523 = [tex]\frac{7!}{2! \times 2!}[/tex] = 1260

The two 3's are always together

Number of 7 digit numbers formed = [tex]\frac{6!}{2!}[/tex] = 360

Fraction of seven number combinations formed used the numbers of the pattern 3795523 will have the two 3's always together = [tex]\frac{360}{1260}[/tex]

                                                                                          = [tex]\frac{2}{7}[/tex]

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By using the concept of probability, it can be calculated that

Probability that the flight arrives on time =  [tex]\frac{399}{500}[/tex]

What is probability?

Probability gives us the information about how likely an event is going to occur

Probability is calculated by Number of favourable outcomes divided by the total number of outcomes.

Probability of any event is greater than or equal to zero and less than or equal to 1.

Probability of sure event is 1 and probability of unsure event is 0.

Total number of flights = 1000

Number of flights arriving on time = 798

Probability that the flight arrives on time = [tex]\frac{798}{1000}[/tex]

                                                                   = [tex]\frac{399}{500}[/tex]

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If a cyclist rides at an average speed of 18 miles per hour then she ride 126 miles in seven hours.

Two or more expressions with an Equal sign is called as Equation.

A cyclist rides at an average speed of 18 miles per hour.

We have to find the number of miles she ride in seven hours

Assume x be the number of miles she ride

Let us form a proportional equation

18/1 = x/7

Apply cross multiplication

18×7=x

126=x

Hence, if a cyclist rides at an average speed of 18 miles per hour then she ride 126 miles in seven hours.

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Answer: 315 children and 15 adults

Step-by-step explanation:

15 x 21 = 315
315 + 15 = 330
c = 315
a = 15

Answer:

y = 2x - 9

Step-by-step explanation:

The slope is the change in y over the change in x.  From the 2 points, the y's are 7 and 5.  The x's are 8 and 7.

[tex]\frac{7-5}{8-7}[/tex] = [tex]\frac{2}{1}[/tex] = 2

2 is the slope.

Now we need to find the y intercept (b).  Use one of the points on the line.  It does not matter which one.  I am going to use (8,7)

slope (m) = 2

x = 8

y = 7

y=mx + b

7 = 2(8) + b  Plug in what we know and solve for b

7 = 16 + b  Subtract 16 from both sides

-9 = b

The y intercept (b) is -9

y = mx + b

y = 2x -9

Answer:

  4/39

Step-by-step explanation:

You want to know the fraction of 39 students represented by the 4 that have blue eyes.

The fraction is the ratio of the part of interest to the whole.

  (students with blue eyes)/(total number of students) = 4/39