Lucy made 247 for 13 hours of work. At the same rate, how much would she make for 9 hours of work?

If Greg plans to purchase a bicycle.

a. A rational function for the average yearly cost of Bike A is C(x) = 270 + 36x.

b. A  rational function for the average yearly cost of Bike B is C(x) = 360 + 20x.

c. Bike A has the lowest average yearly cost over 5 years.

a. The average yearly cost of Bike A can be represented by the rational function:

C(x) = 270 + 36x

where:

x is the number of years that Greg plans to own the bike

270 represents the initial cost of the bike.

b. The average yearly cost of Bike B can be represented by the rational function:

C(x) = 360 + 20x

where:
x is the number of years that Greg plans to own the bike

360 represents the initial cost of the bike.

c. To find the lowest average yearly cost, we need to compare the total cost of owning each bike for 5 years. For Bike A, the total cost after 5 years is:

C(5) = 270 + 36(5) = 450

For Bike B, the total cost after 5 years is:

C(5) = 360 + 20(5) = 460

Therefore, Bike A has the lowest average yearly cost over 5 years, since the total cost of owning it is $450, which is $10 less than the total cost of owning Bike B.

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The most correct answer is D ( 3,-2) . Because in the 2 equations above when you enter the value x= 3 in equation I and II, it produces y=-2.

In the question above, there are two equations.

y=-(½)x - ½ (eq I)

y=-(⅔)x (eq II)

To find which x and y values satisfy these two equations in options A,B,C,D, we have to substitute one by one to prove:

A.(-2, 3)

we substitute the value x=-2 into equation I

y=-(½)x - ½

y= -(½) (-2) -½

y=1-½

y= ½ ( This means that option A is not valid, because it should give y a value of 3)

B.(-1,0)

we substitute the value x=-1 into equation I

y=-(½)x - ½

y= -(½) (-1) -½

y= ½ - ½

y= 0

Then, we try to substitute the value x=-1 into equation II

y=-(⅔)x

y= -(⅔) (-1)

y= ⅔ ( This means option B is not valid, because it should result in y being 0)

C.(1, 2)

we substitute the value x=1 into equation I

y=-(½)x - ½

y= -(½) (1) -½

y= -½ - ½

y= -1 ( This means option C is not valid, because it should result in y being 2)

D. (3,-2)

we substitute the value x=3 into equation I

y=-(½)x - ½

y= -(½) (3) -½

y= -3/2- ½

y=-4/2

y= -2

Then, we try to substitute the value x=3 into equation II

y=-(⅔)x

y= -(⅔) (3)

y=-2

The option D satisfies equations I and II,

Therefore the answer is option D.

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The required polynomial is [tex]12a^{2} -9a+5[/tex]

A polynomial is a expression that contains variables and coefficients, that involves all the four basic arithmetic operations.

Here the given two polynomials are,

[tex]-7a^{2} +3a-9 , 5a^{2} -6a-4[/tex].

subtracting these two polynomials we get,

[tex](5a^{2} -6a-4) - (-7a^{2} +3a-9 ) = 12a^{2} -9a +5[/tex].

Hence, required polynomial is [tex]12^{2} -9a+5.[/tex]

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Answer:

x = - 12 , x = 2

Step-by-step explanation:

[tex]\frac{x+10}{x+7}[/tex] = [tex]\frac{x+2}{2x-1}[/tex] ( cross- multiply )

(2x - 1)(x + 10) = (x + 2)(x + 7) ← expand both sides using FOIL

2x² + 19x - 10 = x² + 9x + 14 ← subtract x² + 9x + 14 from both sides

x² + 10x - 24 = 0 ← in standard form

(x + 12)(x - 2) = 0 ← in factored form

equate each factor to zero and solve for x

x + 12 = 0 ⇒ x = - 12

x - 2 = 0 ⇒ x = 2

Lucia saved the total amount of $100 and Ben saved $50.  Lucia saved twice as much as Ben so for every $1 Ben saved, Lucia saved $2.

Lucia and Ben have saved a total of $150. To solve this problem, we need to determine how much each person saved. We know that Lucia saved twice as much as Ben, so for every $1 Ben saved, Lucia saved $2. Since they have saved a total of $150, we can set up a proportion to solve for Ben's amount. $2:$1::$100:$x We can solve for x to find Ben's amount saved. $2x = $100, so x = $50. Therefore, Lucia saved $100 and Ben saved $50. Lucia saved twice as much as Ben so for every $1 Ben saved, Lucia saved $2.

The complete question: Together, Lucia and Ben have saved $150. Lucia saved $2 for every $1 that Ben saved. How much money did each person save?

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[tex]\sqrt{25y^2+40y+16}=5y+4\implies \stackrel{\textit{squaring both sides}}{25y^2+40y+16=(5y+4)^2} \\\\\\ 25y^2+40y+16=25y^2+40y+16\hspace{5em}\textit{infinitely many solutions}[/tex]

the equation on the left is really the equation on the right in disguise.

for a system of equations, that usually means that one equation is the same as the other, so the graph will be the graph of the second one pancaked over the first one, where they touch each other all the way, and since both lines go to infinity, then they have infintely many solutions.

a) The number of hours the server must work to earn $35 is of: 2.5 hours.

b) The earnings for five hours of work are given as follows: $75.8.

c) As the number of hours worked increases, the earnings also increase.

To find the regression equation, also called line of best fit or least squares regression equation, we need to insert the points (x,y) in the calculator. These points are given on a table or in a scatter plot in the problem.

The points for this problem are given as follows:

(1,10), (2, 27), (3, 45), (4, 55) and (5, 78).

Inserting these points into a calculator, the equation is given as follows:

y = 16.4x - 6.2.

Hence the number of hours needed to earn $35 is given as follows:

35 = 16.4x - 6.2

x = 41.2/16.4

x = 2.5 hours.

The earnings for five hours of work are given as follows:

y = 16.4(5) - 6.2

y = $75.8.

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The function to determine the number of ants Ryan will have in x number of days can be represented as: f(x) = 12 * 3^x

It should be noted that a function shows the relationship between the variables that are provided or the data given regarding an information. In this case, it is vital to note that they have at least two terms which have to be related by through an operator.

The function to determine the number of ants Ryan will have in x number of days can be represented as:

f(x) = 12 * 3^x

where f(x) is the number of ants after x days, and 3^x represents the tripling of the number of ants each day.

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By applying Algebraic fractions simplifying concept, it can conclude that the simplified expression is - (9p + 3) / q.

Algebraic fractions simplifying can be done by factoring the quantifier and denominator, then dividing by the common factors of the quantifier and denominator.

We have the following algebraic fraction:

((9p² - 1) / (pq - 2q)) / (1 - 3p) / (3p - 6)

To simplify this expression, we will do the following steps:

First, we apply the division rule: (a/b) / (c/d) = ad / bc:

    ((9p² - 1) / (pq - 2q)) / (1 - 3p) / (3p - 6)

⇔ ((9p² - 1) (3p - 6)) / ((pq - 2q) (1 - 3p))

Then we find the factors of (9p² - 1), that are (3p - 1) (3p + 1):

⇔ ((3p - 1) (3p + 1) (3p - 6)) / ((pq - 2q) (1 - 3p))

Factor other expressions that are not already factored in:

⇔ ((3p - 1) (3p + 1) 3 (p - 2)) / (q (p - 2) (1 - 3p))

Now we cancel the common factor (p - 2), so we have:

⇔ (3 (3p - 1) (3p + 1)) / (-q (3p - 1))

Then we cancel the common factor (3p -1), so we have:

⇔ (3 (3p + 1)) / -q

Finally, we expand the expression:

⇔ - (9p + 3) / q

Thus the simplified expression is - (9p + 3) / q.

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Answer:

d.  8√2

Step-by-step explanation:

The 2 legs of the right triangle are shown as congruent.  

k is the hypotenuse.

k² = 8² + 8² = 128

√k² = k = √128 = √64·2 = 8√2

The store sold 33 regular towels and 9 beach towels

Here, the store sells 42 towels, represented by the equation

x + y = 42, where x is the number of regular towels

and y is the number of beach towels.

and the equation 7x + 12y = 339 represents the total revenue.

We have system of equations:

x + y = 42              ........(1)

7x + 12y = 339      .........(2)

From equation (1),

x = 42 - y             ..........(3)

Substitute above value of x in equation (2),

7(42 - y) + 12y = 339

294 - 7y + 12y = 339

5y = 339 - 294

5y = 45

y = 9

subatitute above value of y in equation (3)

x = 42 - 9

x = 33

Thus, the number of regular towels = 33 and the number of beach towels = 9

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By using the graph, we can determine that Central Africa receives about 200 millimeters of rainfall in the months indicated by the highest points on the graph.

A graph is a visual representation of data that shows the relationship between two or more variables.

The graph shows the amount of rainfall in millimeters that Central Africa receives each month. By looking at the graph, we can see that the highest amount of rainfall is around 200 millimeters. The months in which Central Africa receives approximately 200 millimeters of rainfall are indicated by the highest points on the graph.

To determine the exact month or months in which Central Africa receives about 200 millimeters of rainfall, we need to look at the axis that represents the amount of rainfall. The vertical axis shows the amount of rainfall in millimeters, and the horizontal axis shows the months of the year.

To determine the month or months in which Central Africa receives about 200 millimeters of rainfall, we need to look for the points on the graph that are closest to 200 millimeters on the vertical axis.

These points will correspond to the months in which Central Africa receives about 200 millimeters of rainfall.

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The expression 6-13 represents starting at 6 on the number line and moving 13 to the left. The correct answer would be an option (C).

In math, a number line can be defined as a straight line with numbers arranged at equal segments or intervals throughout. A number line is typically shown horizontally and can be extended indefinitely in any direction.

As we know that the numbers on the number line increase as one move from left to right and decrease on moving from right to left.

Thus, the expression 6-13 represents starting at 6 on the number line and moving 13 to the left.

Hence, the correct answer would be option (C).

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Answer: The given equation is Y = -10x + 300.

The rate of change of this equation refers to the rate at which Y changes as x changes. This is the same as the slope of the line represented by the equation.

The equation is in the form of y = mx + b, where m is the slope and b is the y-intercept. So, we can see that the slope of the line is -10. This means that for every one unit increase in x, y decreases by 10 units.

Therefore, the rate of change of Y with respect to X is -10.

Answer:

50%

Step-by-step explanation:

Only 4 and 5 can be considered because 6 is not included, so the probability would be 2/4, or 50%.

Answer: 50%

Step-by-step explanation: It says if you pick a random card that is less than 6 or 4. That means that 4 and 5 are the ones you hope to get. 2/4 = 50%.

The average velocity of the object from t = 2 and t = 4 is equal to - 48 feet per second.

In this problem we find the case of an object thrown upward, whose height (h(t)), in feet, as a function of time (t), in seconds, is represented by a quadratic equation. We need to determine the average velocity (u) of the object by means of secant line formula:

u = [h(4) - h(2)] / (4 - 2)

Where:

If we know that h(t) = - 16 · t² + 48 · t + 120, then the average velocity is:

t = 2

h(2) = - 16 · 2² + 48 · 2 + 120

h(2) = 152 ft

t = 4

h(4) = - 16 · 4² + 48 · 4 + 120

h(4) = 56 ft

u = (56 ft - 152 ft) / (4 s - 2 s)

u = - 48 ft / s

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Answer:

20000000 (to 1 s.f.)

Step-by-step explanation:

3204×7756=24850224

=20000000 (to 1 s.f.)

The proportion of vehicles travelling less than 50 mph is 0.1587, as it is the area under the normal curve from 0 to 50 mph.

The speed of vehicles travelling along a stretch of I-10 is assumed to have an approximately normal distribution with a mean of 71 mph and a standard deviation of 8 mph. This means that the majority of vehicles will travel at speeds close to the mean, with fewer vehicles travelling at speeds significantly above or below the mean. To calculate the proportion of vehicles travelling less than 50 mph, we must calculate the area under the normal curve from 0 mph to 50 mph. This is done using a z-score, which is calculated by subtracting the mean from the value and dividing by the standard deviation. In this case, the z-score for 50 mph is -1.375. The area under the normal curve from 0 mph to -1.375 is 0.1587, which is the proportion of vehicles travelling less than 50 mph.

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Answer:

During winter in the Arctic, a lake gets frozen solid with ice. But as spring comes, the ice starts to melt. This happens because the temperature gets warmer and there's more sunlight. It's a natural process that happens every year and shows the change of seasons.

Step-by-step explanation:

The standard deviation is 1.482 when the probability of any particular diode is 0.01, and the circuit board is 200 diodes.

A Bernoulli trial is defined as a random experiment with exactly two possible outcomes, that are "success" and "failure", in which the probability of success is the same every time the experiment is conducted.

The probability for the Binomial distribution is given as:  

[tex]P(X)=(^{n} C_x)P^x(1-P)^n^-^x[/tex]

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

[tex]^nC_x=\frac{x!}{(n-x)!x!}[/tex]

For this case, we assume that the random variable of interest X= number of circuits that are expected to fail in a sample of 200 selected and we know that:

X simBino (n=200,p=0.01)

The expected value is given by:

E(x)=n*p=200*0.01=2

The variance is given by:

Var(x)np(1-P)=200*0.01*(1-0.01)=1.98

And the deviation is given by:

sd(X)=√1.98-1.407

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Answer:

b = 33 millimeters.

Step-by-step explanation:

In a right triangle, the Pythagorean theorem states that the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the legs (a and b). So, using a=56 and c=65, we can find b by solving the equation: 56^2 + b^2 = 65^2. This gives b = sqrt(1089) = 33 millimeters :)

By solving linear equations we will see that they will have the same amount after 6 weeks.

We know that Lauren has $400 in her savings account and spends $20 each week, then the amount that she has after x weeks is modeled by the linear equation below:

y = 400 - 20x

And Lydia has $250 in her account and saves $5 each week, then her equation is:

y = 250 + 5x

They we have the same amount of money when:

400 - 20x = 250 + 5x

400 - 250 = 5x + 20x

150 = 25x

150/25 = x

6 = x

After 6 weeks they will have the same amount of money.

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The size of the wire is the dependent variable and the battery life is the independent variable.

In any equation, the variables that represent the input and output are referred to as independent and dependent variables, respectively.

Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that Drew is experimenting on a circuit. He wants to know if the size of the wire used affects battery life.

Here, the battery life is the independent variable, while the size of the wire is the dependent variable.

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If at least one of the rolls is a 1, then there is a 1/12 chance that the total of the two dice roll will be less than 4.

idiom, informal, used to indicate that a situation could result in either a good or negative outcome. It's always a gamble to open a new restaurant. Whether we succeed or fail is up to chance.

Probability is calculated as follows: 3 out of 36 potential outcomes x desired outcomes = 0.0833. 8.33 percent is the calculated percentage. 7 is also the most frequent outcome when two dice are used. There are also six different ways to do it. The chance in this situation is 6 x 36 = 0.167, or 16.7%.

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Answer:

274.75 in²

Step-by-step explanation:

Area of a circle = πr² = (3.14)(20/2)² = 314 in²

(314 in²)(1/8) = 39.25 in²

Pizza remaining = 314 - 39.25 = 274.75 in²

Answer: 274.75

Step-by-step explanation:

Diameter=20

r= 20/2=10

A= π[tex]r^{2}[/tex]

   = 3.14*10*10

   = 314 square inches

1/8 of 314 = 39.25

So, are of remaining pizza = 314-39.25

                                              = 274.75 square inches

In a right triangle the length of the projection of the shorter leg on the given hypotenuse is equal to 18 units.

In a right triangle ,

length of the hypotenuse = 50 units

length of the longer leg is equal to 40 units

let us consider 'x' be the length of the another leg of right triangle.

Using Pythagoras theorem ,

Hypotenuse² = Base² + Altitude²

⇒ 50² = x² + 40²

⇒ x² = 2500 -1600

⇒ x = 30

Let 'y' be the length of the projection of shorter leg on the hypotenuse

Triangle formed by projected line segment and given right triangle are similar.

Using property of similar triangles  corresponding sides are in proportion,

30 / 50 = y / 30

⇒ 50 y = 30 × 30

⇒ y=  900 / 50

⇒ y= 18units

Therefore, the length of the projected leg on hypotenuse of the right triangle is 18 units.

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The average depth of the water between krakatau and jakarta is 0.41 kilometers.

We have a function as ,

s= 356√d

where,

s = speed

d = depth of the water

If we have speed of tsunami as 60 kilometers per hour putting the value in the equation,

s= 356√d

60 = 356 √d

√d = 60/356

d = 0.41

Therefore, depth of the water between krakatau and jakarta is 0.41 kilometers.

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complete question:

A volcano erupted on the island of Krakatau, Indonesia. The eruption caused a tsunami(a type of wave) to form and travel into the Indian Ocean and into the Java Sea. The speeds(in kilometers per hour) that a tsunami travels can be modeled by s= 356√d where dis the depth (in kilometers) of the water.1.A tsunami from Krakatau hit Jakarta traveling about 60 kilometers per hour. What is the average depth of the water between Krakatau and Jakarta.

Step 1: Calculate the circumference of the circle.

Circumference = 2πr

Where 'r' is the radius of the circle.

Since we know the center of the circle is point A, we can calculate the radius of the circle by measuring the distance from point A to any point on the circumference.

Let's say we measure the distance from point A to point B.

Radius = AB = x

Step 2: Calculate the circumference of the circle.

Circumference = 2πx

Step 3: Calculate the length of arc bcp.

We know that the length of arc bcp is 2/5 of the circumference of the circle. So,

Length of arc bcp = (2/5) × (2πx)

Length of arc bcp = (4πx)/5

Step 4: Solve for x.

To solve for x, we will rearrange the equation:

(4πx)/5 = Length of arc bcp

5 × (4πx)/5 = 5 × Length of arc bcp

4πx = 5 × Length of arc bcp

4πx = 5 × (2/5) × (2πx)

4πx = 4πx

Since both sides of the equation are equal, x = x.

Therefore, the value of x is equal to itself.

The concept of tangents, sectors, angles, the chord of a circle, and proofs are all included in the circle theorem. All points in a plane that are equally far from a fixed point are located in a circle.

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The angle that must the 14-foot long wire make with the ground = 50.6°

Consider the following diagram.

AC represents the pole.

AB represents the supporting wire of length 14 ft and AD is wire of length 17 ft.

The wires are to be secured to the ground 22 feet from each other.

BD = 22 ft

We need to find angle that must the 14-foot long wire make with the ground i.e., angle ACD

Using law of cosines,

c² = a² + b² - 2ab. cos(x)

where x = ∠ABD

c is the opposite side of angle x

a and b are adjacent sides of angle x

here,  c = 17, a = 14, and b = 22

Substitute these values in above formula,

17² = 14² + 22² - 2(14)(22). cos(x)

289 = 196 + 484 - 616 cos(x)

-391 = -616 cos(x)

cos(x) = (391/616)

x = arccos(391/616))

x = 50.6°

Therefore, the required angle is 50.6°

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Bipana will get an amount of Rs 114, whereas Karishma gets Rs 152.

The ratio is depicted as a comparison of two quantities of the same unit to determine how much of one quantity is included in the other.

A sum of money is divided between both in the ratio of 3: 4.

Let the amount of money got by Bipana be 3x and the amount of money got by Karishma be 4x.

Since Karishma gets Rs 152.

So 4x = 152

Now, solving for x:

x = 152/4

Apply the division operation, we get:

x = 38

So, the amount of money got by Bipana is: 3(38) = Rs 114

Therefore, Bipana will get an amount of Rs 114.

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