A store buys sneakers for $20.00 and marks them up 250%. What is the selling price?

Answer:

y = -x² + 6x - 1

General Formulas and Concepts:

Algebra I

Step-by-step explanation:

Step 1: Define equation

y = -(x - 3)² + 8

Step 2: Rewrite

Answer:

All the points that lie on the line:

\(y(x)=x-1\)

Step-by-step explanation:

In order to find the maximum rate of change, we need to find the gradient of the function. The gradient of a function of two variables is defined to be:

\(\nabla f =\frac{\partial f}{\partial x} i + \frac{\partial f}{\partial y} j\)

So:

\(\frac{\partial f}{\partial x} = 2x-4=2(x-2)\\\\\frac{\partial f}{\partial y} = 2y-2=2(y-1)\)

Hence:

\(\nabla f(x,y)=2(x-2)i+2(y-1)j\)

Since we need to find all the points at which the direction of fastest change of the function \(f(x,y)=x^{2} +y^{2} -4x-2\) is \(i+j\). Then:

\(2(x-2)i+2(y-1)=ai+aj\\\\a>0\)

Therefore:

\(2(x-2)=2(y-1)\\\\Solving\hspace{3}for\hspace{3}y\\\\y=x-1\)

So, we can conclude, that all the points where the direction of fastest change of \(f(x,y)\) lie on the line:

\(y(x)=x-1\)

Answer:

A=a2=142=196cm²

Answer: 196 cm²

hope this helps :)

Answer:

196cm²

Step-by-step explanation:

All of a square's sides are congruent which means if one side is 14cm then all the other sides have to be 14cm as well.

To find the area you multiply the length and the width (A=l*w)

l=14, w=14

14*14=196cm²

The perimeter of the rectangle with area of 108 cm is 48 cm.

The perimeter of a rectangle is the sum of the whole sides of the rectangle. A rectangle is a quadrilateral with opposite side equal to each other.

Therefore,

area of a rectangle = lw

where

Therefore,

l = 3w

108 = 3w(w)

108 = 3w²

w² = 108 / 3

w = √36

w = 6

Hence,

length = 3(6) = 18

Therefore,

perimeter of the rectangle = 2(l + w)

perimeter of the rectangle = 2(18 + 6)

perimeter of the rectangle = 2(24)

perimeter of the rectangle = 48 cm

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Answer:

4 1/10 when u have a inproper fraction like that every 10 is one whole number

The probability is P = 0.135

First, we need to find the individual probabilities, that are given by the quotient between the number of outcomes that meet the condition and the total number of outcomes.

The joint probability is given by the product between the individual probabilities, so we get:

P = (1/2)*(3/6)*(28/52) = 0.135

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The normal force acting on the body is 49.05N

Data;

To calculate the horizontal force or the force acting on the horizontal plane on the body is given as

\(N + fsin\theta = mg\)

Where N = normal force

Let's substitute the values and solve.

\(N = mg - fsin\theta\\N = (5 * 9.81) - 6 sin (0)\\N = 49.05N\)

The normal force acting on the body is 49.05N

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Answer:

Goes on forever.

Step-by-step explanation:

Answer:

A = 22.62°

B = 67.38°

c = 26

Step-by-step explanation:

\(a^2+b^2=c^2\\10^2+24^2=c^2\\100+576=c^2\\676=c^2\\26=c\)

\(\sin A=\frac{\text{Opposite}}{\text{Hypotenuse}}=\frac{10}{26}\\\\A=\sin^{-1}(\frac{10}{26})\\\\A\approx22.62^\circ\)<-- You can also use other trig ratios

\(B=180^\circ-(90^\circ+22.62^\circ)=180^\circ-112.62^\circ=67.38^\circ\)

There's no specific order in how to solve for A and B, so there may be more than one way to approach these solutions.

so lets start with making these equations

x + y = 43

x - y = 7

now we can rewrite the second equation in terms of x

x = 7 + y

now we plug that x value back into the first equation

7 + y + y = 43

7 + 2y = 43

2y = 36

y = 18

now we can plug the value of y into the rewritten second equation leaving us with

x = 7 + 18

x = 25

so y = 18 and x = 25

and the difference is 7

please give brainliest!

The answer would be C - "Cheetah B has a higher ratio of miles per minute than Cheetah A because 17 over 8 is less than 56 over 20."

also "get it right please" ?! how rude

3.     5x+19

4.     7f+7

i'm not so sure but i tried

Answer:

1920 cubes.

Step-by-step explanation

Turn both the mix numbers into improper fractions.

2 2/5 = 12/5

3 1/5 = 16/5

Then you will turn 1/5 into its reciprocal and multiply both the improper fractions by it. You can just casually multiply 2 and 5.

12/5 * 5/1 = 12

16/5 * 5/1 = 16

2 * 5 = 10

Next you multiply all together to get 1920 cubes.

(I could be missing a step. I apologize if I did.)

Approximately 456.3 feet of fence to surround the entire circular yard.

Now, For the amount of fencing needed to surround a circular yard, we have to calculate the circumference of the circle, which is the distance around the circle.

Since, The circumference of a circle is,

⇒ C = πd,

where, C is circumference, d is diameter,

Here, the diameter of the circular yard is 145 feet,

So the radius is half of that,

r = 145/2 = 72.5 feet.

So, Using the formula, we can calculate the circumference as:

C = πd

C = 3.14 x 145

C = 456.3 feet

Therefore, Approximately 456.3 feet of fence to surround the entire circular yard.

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Answer:

Step-by-step explanation:

To check whether the given credit card number is valid or not, we need to apply the Luhn algorithm or the mod-10 algorithm. The Luhn algorithm works by adding up all the digits in the credit card number and checking if the sum is divisible by 10 or not. If it is, then the credit card number is considered valid, otherwise, it is invalid.

Let's apply the Luhn algorithm to the given credit card number:

Step 1: Starting from the rightmost digit, double every second digit

| 5 | 4 | 2 | 4 | 9 | 8 | 1 | 3 | 2 | 7 | 2 | 0 | 0 | 0 | 8 | 5 |

|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|

| | 8 | | 8 | | 16| | 6 | | 14| | 0 | | 0 | | 10|

Step 2: If the doubled value is greater than 9, add the digits of the result

| 5 | 4 | 2 | 4 | 9 | 8 | 1 | 3 | 2 | 7 | 2 | 0 | 0 | 0 | 8 | 5 |

|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|

| | 8 | | 8 | | 7 | | 6 | | 5 | | 0 | | 0 | | 1 |

Step 3: Add up all the digits in the credit card number, including the check digit

5 + 4 + 2 + 4 + 9 + 8 + 1 + 3 + 2 + 7 + 2 + 0 + 0 + 0 + 8 + 5 + 1 = 61

Step 4: If the sum is divisible by 10, then the credit card number is valid, otherwise, it is invalid.

61 is not divisible by 10, therefore the given credit card number is invalid.

Hence, it can be concluded that 5424 9813 2720 0085 is an invalid MASTERCARD credit card number.

Answer:

1,800 lbs of sand

900 lbs of gravel

600 lbs of cement

Step-by-step explanation: 11*300=3,300. 300*6=1,800, 300*3=900, and 300*2=600. This is correct because if you add 1,800+900+600 you get 3,300.

Answer:

3

Step-by-step explanation:

4*3/4 is basically 4*3=12/4 which is 3

Answer:

3

Step-by-step explanation:

3/4*4=12/4

12/4 diveded by 4 is 3

Answer:

option D is the right option.

Solution,

1 liquid pint=0.5 liquid quart

( 2 pints=1 quart)

Since,

2 pints=1 quart them,

14 pints=7 quarts

Ratio is 14 pints(7 quarts) to 45 pints.

Thus the fraction is:

\( \frac{14}{45} \)

hope this helps...

Good luck on your assignment..

The equation of a line in its slope-intercept form is given as:

where m is the slope and b is the y-intercept. In this case we have that m=2/5 and b=3, therefore the equation is:

and the answer is the third option

The circumference of Circle B is 34.5 meters.

What is circumference ?

Let's start by finding the diameter of Circle A. The formula for the circumference of a circle is:

C = πd

where C is the circumference and d is the diameter.

So we can solve for the diameter of Circle A by rearranging the formula:

d = C/π = 23/π

Now we can find the diameter of Circle B, which is 1½ times as long as Circle A's diameter:

d(B) = 1.5d(A) = 1.5(23/π)

Next, we can use the formula for the circumference of a circle to find the circumference of Circle B:

C(B) = πd(B)

C(B) = π(1.5)(23/π)

C(B) = 1.5(23)

C(B) = 34.5 meters

Therefore, the circumference of Circle B is 34.5 meters.

What is diameter of circle?

The diameter of a circle is the distance across the circle passing through its center. It is the longest chord of the circle and is twice the length of the radius.

The formula for the diameter of a circle is:

d = 2r

where d is the diameter and r is the radius of the circle.

Alternatively, we can use the formula for the circumference of a circle to find the diameter:

d = C/π

where C is the circumference of the circle and π (pi) is a mathematical constant approximately equal to 3.14159.

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Complete question is: Circle A has a circumference of 23 m. Circle B has a diameter that is 1½ times as long as Circle A's diameter. the circumference of Circle B is 34.5 meters.

Answer:

To begin the conversion to base-3, we divide our number by 3. We don't need to worry about decimal points, just what the remainder is. Let's divide 42 by 3. We get 14 with remainder 0.

Answer:

To begin the conversion to base-3, we divide our number by 3. We don't need to worry about decimal points, just what the remainder is. Let's divide 42 by 3. We get 14 with remainder 0.

Step-by-step explanation:

that is ur answer

y-intercept of given function is y = 1

How to graph the function?

The collection of ordered pairings with the (x,y). (x,y) sign is known as the graph of a function in mathematics, where  f(x)=y. x and  f(x) are Cartesian coordinates of points in two-dimensional space, and in the typical scenario where they are real numbers, they constitute a subset of this plane.

Given function , f(x) = 2· \(3^{x}\)

Graph of the function is given below:

As the given graph is intersecting the y-axis at y=1 So, y-intercept of given function is y = 1

Therefore, y-intercept is y = 1

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Here, we want to use the converse of the Pythagorean theorem to check if the roped off area is in the shape of a right triangle

According to the converse, we have it that;

if;

Then, we have a right triangle, given that c is the longest side

So, by using the side lengths of the roped off area, if the square of the length of the longest side of the roped off area is equal to the sum of the squares of the other two sides of the roped off area, then what we have is a right triangle

The conclusion of the hypothesis testing is that; there is not enough evidence to support the claim that the mineral changes a person’s cholesterol level.

Hypothesis testing is defined as the method that is used to find the probability of the hypothesis to be proved in the future on the basis of the small population sample.

Let us first define the hypothesis in this problem;

Null Hypothesis; H₀: μ_d = 0

Alternative Hypothesis; Hₐ: μ_d ≠ 0 (Claim)

The degree of freedom is;

DF = n - 1

DF = 6 - 1

DF = 5

At a significance level of α = 0.10, with a DF of 5, the critical values are ±2.015.

Using a computer software, we can calculate the mean from the attached table as;

D' = ∑d/n

D' = 100/6 = 16.7

Similarly, the standard deviation is calculated from the formula;

S_d = √(n∑d² - (∑d)²)/(n(n - 1))

s_d = √(6.489 - 100²)/(6(6 - 1))

s_d = 25.4

The test statistic is gotten from the formula;

t = (D' - μ_d)/(s_d/√n)

t = (16.7 - 0)/(25.4/√6)

t = 1.610

This is less than the critical value and we fail to reject the null hypothesis and conclude that there is not enough evidence to support the claim that the mineral changes a person’s cholesterol level.

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Answer: 67.15

Step-by-step explanation:

So, 30 reflects the amount of water that is being removed from the swimming pool per minute in gallons.

In the provided formula, 25,000 - 30x, x is the amount of time in minutes and 30 is the pace in gallons per minute at which the pool is draining.

The expression is a linear equation of the form y = mx + b, where x is the length of time that has passed and y is the amount of water that is still in the pool.

The slope (m) of the equation in this instance is -30, which means that the pool's water level is dropping at a rate of 30 gallons per minute.

The expression's value decreases as more time passes because the value of x rises. As a result of the water draining out of the pool at a constant rate of 30 gallons per minute, the pool's volume is dropping linearly over time.

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Answer:

c! I had the same one in my class I'm pretty sure I was right

(can you make me brainleist I need to level up)

The correct answer is John's weekly salary is $240 based on his hourly pay rate and the number of hours worked.

Let's choose the function "Weekly salary is a function of the hourly pay rate and the number of hours worked."Example: John works as a part-time employee at a grocery store. His hourly pay rate is $12, and he worked for 20 hours in a week. We can evaluate the function to find his weekly salary.

Weekly salary = Hourly pay rate * Number of hours worked

Weekly salary = $12/hour * 20 hours

Weekly salary = $240

So, John's weekly salary is $240 based on his hourly pay rate and the number of hours worked.

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