Which number line shows the points −125 and –2.8?
A. Alternative Text
B. Alternative Text
C. Alternative Text
D. Alternative Text

Answer:

x = 14 and y = 42

Step-by-step explanation:

From the two entries that have both the numbers od adults*A) and students(S) we find a ratio of S/A to be 7 for both cases.  We'll make the assumption that is the same ratio in the two cases involving x and y.

To find x and y, multiply the number of adults by 7 to find the number of students,

x = 14 and y = 42

A      S    Ratio S/A = 7

1 7      7

2 x     14

4 28    28

6 y    42

The online shopping site would sell 756000 items in 30 minutes

Given

The online site would sell 420 items in a second

To find number of items it would sell in 30 minutes first of all convert minutes into seconds and continue to solve the problem.

To convert minutes into seconds just multiply minutes with 60.

because one minute is equal to 60 seconds.

Therefore 30 minutes = 30 x 60 seconds

30 minutes = 1800 seconds

Say the number of items sold by sire in 30 minutes be x.

now according to the condition in equation

420 x 1800 = x

x= 756000

Hence the site will sell 756000 items in 30 minutes.

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The answer is FALSE. The likelihood of discovering a substantial difference between treatments does not increase with any factor that makes treatments more variable.

In experiments, you create situations where several treatments (such a are used in order to investigate the impact of an independent variation.

Every participant in a between-subjects or between-groups design only experiences one condition, and group differences between participants in various conditions are compared. In contrast, no participant in a within-subjects design is exposed to every condition.

As a result, the likelihood of discovering a substantial difference between treatments is not increased by factors that enhance variation within treatments.

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The ratio of the volume of the large sphere to the volume

of the small sphere is 1226 .

V = 4/3 r³ is the equation to calculate a sphere's volume. The volume of a sphere is calculated using the following formula: 4/3rds of Pi and the cube of the sphere's radius. A sphere is a geometrical object that is a three-dimensional equivalent of a two-dimensional circle . A sphere is a collection of points in three-dimensional space that are all located at the same r distance from a particular point. The radius of the sphere is equal to r, and the provided point is its center. In the works of the ancient Greek mathematicians, spheres are first mentioned.

In several branches of mathematics, the sphere serves as a basic building block. Also found in nature and industry are spheres and nearly-spherical shapes.

Volume sphere = 4/3πr³

Volume of sphere 1

D = 4 inches

r = 2 inches

So,

Volume = 4/3π(2)³

= 33.51 inches³

Volume of sphere 2

D = 428 inches

r = 214 inches

So,

Volume = 4/3π(214)³

= 4.11 ×[tex]10^{7}[/tex] inches³

Ratio

= sphere 2: sphere 1

= 4.11 ×[tex]10^{7}[/tex] : 33.51

= 1226

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Answer: c. Vertical angles

Step-by-step explanation:

Answer:

f(-4) = - 87

Step-by-step explanation:

f(-4) = - 4·(-4)^2 + 3·(-4) - 11

f(-4) = - 4·16 - 12 - 11

f(-4) = - 64 - 12 - 11

f(-4) = - 87

Step-by-step explanation:

1.

[tex]f( - 4) = - 4( - 4) ^{2} + 3( - 4) - 11[/tex]

2.

[tex] f( - 4) = - 4(16) - 12 - 11[/tex]

3.

[tex]f( - 4) = - 64 - 23[/tex]

4.

[tex]f( - 4) = - 87[/tex]

The equation is  1068.50 + 37.75 x =  1672.50 and the value of x is 16.

Members of our lacrosse team raised 1672.50 to go to a tournament.

Amount raised by lacrosse team = 1672.50

Let the number of players in lacrosse team = x

They rented a bus for 1068.50 and budgeted $37.75 per player for meals. So, mathematically this can be represented as

1068.50 + 37.75 x

Total amount paid by lacrosse team =  1068.50 + 37.75 x

As amount raised by lacrosse team and the amount paid by lacrosse team are equal so we can write

1068.50 + 37.75 x =  1672.50

37.75 x =  1672.50 - 1068.50

37.75 x =  604

x = 16

Thus, we can conclude that the value of x is 16 and the equation is 1068.50 + 37.75 x =  1672.50.

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The car' s worth after the end of third year will be $18100.

An asset loses value over time as a result of use, damage, or obsolescence. Depreciation is the measurement for this decline. Depreciation, or a decline in asset value, can be brought on by a variety of other variables, such as bad market conditions, etc. Depreciation is the estimated decrease in value of fixed assets over the course of a fiscal year. Large lump sum purchases are made for tangible things like real estate, machinery, vehicles, and so forth.

Given Data

An automobile purchased for $34,000 is worth $2200 after 6 years.

Annual depreciation = [tex]\frac{34000-2200}{6}[/tex]

Annual depreciation = [tex]\frac{31800}{6}[/tex]

Annual depreciation = 5300

In 3 years depreciation would be

= 5300(3)

= 15900

Thus the value after the end of third year will be:

34000 - 15900

18100

The car' s worth after the end of third year will be $18100.

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Answer:

[tex]f(x)=x^2+9x+4+\dfrac{9}{x-4}[/tex]

Step-by-step explanation:

Long Division Method of dividing polynomials

Given:

[tex]\textsf{Dividend: \quad $x^3+5x^2-32x-7$}[/tex]

[tex]\textsf{Divisor: \quad $x-4$}[/tex]

[tex]\large \begin{array}{r}x^2+9x+4\phantom{)}\\x-4{\overline{\smash{\big)}\,x^3+5x^2-32x-7\phantom{)}}}\\{-~\phantom{(}\underline{(x^3-4x^2)\phantom{-b))))))..)}}\\9x^2-32x-7\phantom{)}\\-~\phantom{(}\underline{(9x^2-36x)\phantom{)))..}}\\4x-7\phantom{)}\\-~\phantom{()}\underline{(4x-16)\phantom{}}\\9\phantom{)}\\\end{array}[/tex]

Therefore:

[tex]f(x)=x^2+9x+4+\dfrac{9}{x-4}[/tex]

Definitions

Dividend: The polynomial which has to be divided.

Divisor: The expression by which the divisor is divided.

Quotient: The result of the division.

Remainder: The part left over.

The rate of change of the given relation is 1.7142 the value of y is 36 centimeters.

The rate of change is the change of a quantity over 1 unit of another quantity.

Most of the time the rate of change is the change with respect to time.

As per the given question,

The water level rises 12 centimeters every 7 minutes.

0 minutes → 0 cm

7 minutes → 12 cm

14 minutes → 24 cm

21 minutes → 36 cm.

Since, (21,y) best match with the above condition.

So, 21 minutes is the time taken while 36 cm is the level of water.

Slope or rate of change = 12/7 cm/minutes.

And, 36/21 = 12/7 (proved)

Hence "The rate of change of the given relation is 1.7142 the value of y is 36 centimeters".

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Answer:

B) y= 5x + 26

Step-by-step explanation:

if susie starts with 26 rocks and adds 5 rocks each month and x=months then the correct option is Option B

Answer:  y = 5x+26  (choice B)

==========================================

Explanation:

The equation y = mx+b is in slope intercept form

m = slope

b = y intercept

The y intercept is the starting amount. In this case, she starts with b = 26 rocks. The m = 5 refers to the fact she adds 5 rocks per month. Each time x goes up by 1, y goes up by 5. Think of slope = rise/run = 5/1

rise = 5 = go up by 5 rocks

run = 1 = each time you go up by 1 month

The height of the wall in feet is 2.5 feet.

According to the question,

We have the following information:

The number of bricks, B , needed to build a wall of length L feet and uniform height H feet can be found by the equation B = 7 L H .

A wall of uniform height that is 16 feet long is constructed using 280 bricks.

So, we have:

B = 280 and H = 16

Putting these values in the given expression:

B = 7LH

280 = 7*L*16

L = 280/(7*16)

L = 280/112

L = 2.5 feet

Hence, the height of the wall in feet is 2.5 feet.

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A solution of NaOH is a really strong base, so, when it's dissolved in water to form a solution, it dissociates completely in it's ions: and its

pH = 14.8344 and rounded it will be 14.8

it dissociates completely in it's ions:

NaOH -------> Na⁺ + OH⁻

So, to calculate the pH, we first need to calculate the OH concentration. As it was stated before, a strong base like this, it will dissociate completely so the concentration of OH will be the same concentration of NaOH:

[OH⁻] = 6.83 M

The pH is calculated with the following expression:

14 = pH + pOH

So, with the OH we can calculate the pOH, and then, the pH:

pOH = -log[OH⁻]

pOH = -log(6.83) = -0.8344

So the pH:

pH = 14 - pOH

pH = 14 - (-0.8344)

pH = 14.8344 and rounded it will be 14.8

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The quadratic equation that models the fuel efficiency of the car is given by:

y = -0.01(x - 55)² + 32.

The equation of a quadratic function, of vertex (h,k), is given by the following rule:

y = a(x - h)² + k

In which the parameters of the equation are described as follows:

For a certain model of car the fuel efficiency is maximized at 32 miles per gallon with a speed of 55 mph, hence the vertex is given by:

(h,k) = (55,32).

Hence the rule is:

y = a(x - 55)² + 32

When x = 65, y = 31, hence we can find the leading coefficient a as follows:

31 = a(65 - 55)² + 32

100a = -1

a = -0.01.

Hence the equation is given by:

y = -0.01(x - 55)² + 32.

The problem is incomplete, hence we suppose that it asks for the quadratic model of the car's fuel efficiency.

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An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

The given system of equations has no solution.

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

Example: 2x + 3 = 4 is an equation.

We have,

-3x + 3y = 4 ____(1)

2x = 2y + 6 _____(2)

From (2) we get,

x = (2y + 6) / 2

x = y + 3 ____(3)

Substituting (3) on (1).

-3 (y + 3) + 3y = 4

-3y - 9 + 3y = 4

-9 = 4

We see that there are no solutions to the given equation.

Thus,

The given system of equations has no solution.

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Answer:

I haven't done much of this off the internet but from what I found you would just write the same number so 1 would be 1 however if it's super serious you might want to wait for someone else to answer this.

Step-by-step explanation:

[tex]\begin{cases} f(x)=3x-1\\\\ (f\circ g)(x) = x^2 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ (f\circ g)(x)\implies f( ~~ g(x) ~~ )~~ = ~~3( ~~ g(x) ~~ ) - 1\implies \stackrel{(f\circ g)(x)}{x^2}~~ = ~~3g(x)-1 \\\\\\ x^2+1=3g(x)\implies \cfrac{x^2+1}{3}=g(x)[/tex]

The sum of the two digits of Joey's age the next time his age is a multiple of Zoe's age is of 11, and this measure was found using a system of equations.

The variables for the system of equations in this problem are given as follows:

Joey is one year older than Chloe, hence:

x = y + 1.

Zoe is exactly one year old, hence:

z = 1.

The difference between the ages of Chloe's and Zoe's have 9 factors. Numbers with nine factors have the following format:

x² x y² , with different x and y.

These numbers have to be different of 1, due to Zoe's age, hence the smallest number is given as follows:

2² x 3² = 4 x 9 = 36.

Since the difference is of 36 years old, so the ages are as follows:

The next time this will happen is in 36 years, hence Joey's age will be of:

36 + 38 = 74 years old.

The sum of the digits will be of:

7 + 4 = 11.

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There are 16 half-cup servings of beans and 4, three-ounce servings of shrimp.

An equation is an expression that shows the relationship between two or more numbers and variables.

Let x represents number of half-cup servings of beans

Let y represents  number of 3 ounce servings of shrimp  

We have a system of equations, one for carbs and one for calories;

7x + 9y = 150

30x + 190y = 1400  

Now,

30(7x + 9y) = 30(150)  

-7(30x + 190y) = -7(1400  )  

210x + 270y = 4440  

-210x - 1330y = -8680

-1060y = -4240  

y = 4

Then substitute we get;

7x + 9y = 150

7x + 9(4) = 150

7x + 36 = 150

7x =  112

x = 16

Hence; X = 16 and Y= 4

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The percentage profit for the so is that were made is 40.32%.

From the information, Rowena buys cashmere wool in 20g balls. Each ball of cashmere wool costs her £1.42 and she pays her sister £8 to knit each pair of socks. The cost will be:

= (£1.42 × (20 + 135) + (40 × £8)

= £220.1 + £320

= £540.1

The selling price will be:

= £18.95 × 40

= £758

Therefore, the percentage profit will be:

= Profit / Cost price × 100

= (758 - 540.1) / 540.1 × 100

= 217.9 / 540.1 × 100

= 40.32%

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There is not enough evidence to support the claim that women who exercise daily have a significantly different duration of labor than all women.

Standard error sm = 1.634

Test statistic t = 1.102

P-value = 0.28

This is a hypothesis test for the population mean.

The claim is that women who exercise daily have a significantly different duration of labor than all women.

Then, the null and alternative hypothesis are

[tex]H_{0}[/tex] : μ=16

[tex]H_{0}[/tex] : μ≠ 16

The significance level is 0.05.

The sample has a size n=29.

The sample mean is M=17.8.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=√77.4=8.8.

The estimated standard error of the mean is computed using the formula:

[tex]s_{M}[/tex]   =   [tex]\frac{s}{\sqrt{n} }[/tex]   =   [tex]\frac{8.8}{\sqrt{29} }[/tex]=   1.634

Then, we can calculate the t-statistic as

t=(M-μ)/(s/[tex]\sqrt{n}[/tex])=(17.8-16)/1.634)=1.102

The degrees of freedom for this sample size are:

df=n-1=29-1=28

This test is a two-tailed test, with 28 degrees of freedom and t=1.102, so the P-value for this test is calculated as (using a t-table):

[tex]P_{value}[/tex]=2.P(t≥1.102)=0.28

As the P-value (0.28) is bigger than the significance level (0.05), the effect is not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that women who exercise daily have a significantly different duration of labor than all women

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I will plug in the POINTS including k in the equation each point in its place either x or y.

[tex]( - 2)^{2} +( {k})^{2} = 20 \\ 4 + {k}^{2} = 20 \\ k^{2} + 4 - 20 = 0 \\ {k}^{2} - 16 = 0 \\ (k + 4)(k - 4) = 0 \\ \\ k + 4 = 0 \\ \\ or \\ \\ k - 4 = 0 \\ \\ k = 4 \\ or \\ k = - 4[/tex]

ATTACHED IS THE SOLUTION

Answer:

Answer down below!

Step-by-step explanation:

Let's rewrite the sentence and then pinpoint the exact points!

Your conclusion will be bolded!

"If you are living in California, then you live in the state that has the tallest mountain in the lower 48 states."

The conclusion is the last part of the statement that clearly states the decision based on the components of the test (or hypothesis)

Answer:

15 ft

Step-by-step explanation:

5:8

?:24

8x3=24    SO    5x3=15

All real numbers r for which there exists exactly one real number a such that when (x+a)(x² +rx+1) is expanded to yield a cubic polynomial, all of its coefficients are greater than or equal to zero are given as r = -1

A real number is a quantity of a continuous number that can express a distance along a line in mathematics.

Hence the workings for the above result are indicated as follows:

Expanding the brackets, we see that we want the following three inequalities to be true.

a ≥ 0 (constant term)         (1)

ar + 1 ≥ 0 (coefficient of x) (2)

a + r ≥ 0 (coefficient of x²) (3)

If r ≥ 0, then any a ≥ 0 meets the requirement of (1), (2), and (3).

It remains to address r < 0. In this case, note that (3) immediately suggests (1)  


Hence, we only need to look at (2) and (3). Given that r < 0, inequalities (2) and (3) are equivalent to the following.

a ≤ − 1/r                        (4)

a ≥ − r                           (5)

Therefore, we seek all values of r < 0 such that there is exactly one real number satisfying the expression −r ≤ a ≤ −1/r                 (6)

Thus −r = −1/r ,

This implies r = ±1.

Given that r < 0 we have r = −1.

This implies that the only corresponding value of a is a = 1.

It only remains to follow that (x + 1)(x² − x + 1) = x³ + 1, which has no negative coefficients.

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Full Question:

Find all real numbers r for which there exists exactly one real number a such that when (x+a)(x² +rx+1) is expanded to yield a cubic polynomial, all of its coefficients are greater than or equal to zero.

Answer: 3,000

Step-by-step explanation: the 7 in the hundreds place is greater than 5 so you increase the 2 in the thousands place by 1

Although part of your question is missing, you might be referring to this complete question "Translate the sum of m and 2.33 multiplied by s is 77.77 into an algebraic equation. Do not solve the equation."

Translated equation is m + 2.33s = 77.77

An algebraic equation is the equality of two expressions formulated by applying a set of variables such as addition, subtraction, multiplication, division, raise to power, etc. The phrase " the sum of a and b" into an algebraic expression is determined as a+b. It deals with symbols and these symbols deal with each other through variants.

Hence, the equation translated is a linear equation of algebraic equations.  m+ 2.33s = 77.77

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[tex]\frac{v}{8} -3.1=-15.9[/tex]

Simplify equation:

[tex]\frac{1}{8}v+-3.1=-15.9[/tex]

[tex]\frac{1}{8} v-3.1=-15.9[/tex]

Add 3.1 to both sides:

[tex]\frac{1}{8} v-3.1+3.1=-15.9+3.1\\[/tex]

[tex]\frac{1}{8} v=-12.8[/tex]

Multiply both sides by 8:

[tex]8\times(\frac{1}{8} v)=(8)\times(-12.8)\\-102.4[/tex]

[tex]\fbox{v=-102.4}[/tex]