Kinley bought 3 notebooks that cost the same and a poster that cost $6. She spent $20.40 in all. What was the cost of each notebook?

The number 19,761 is divisible by the following numbers: 1, 3, 7, 21, 941, 2,823, 6,587, and 19,761.

When 19,761 is divided by any of these numbers, we obtain a whole number without any remainder.

In other words, the factors of 19,761 include 1, 3, 7, 21, 941, 2,823, 6,587, and 19,761.

19,761 ÷ 1 = 19,761

19,761 ÷ 3 =  6,587

19,761 ÷ 7 = 2,823

19,761 ÷ 21 = 941

19,761 ÷ 941 = 21

19,761 ÷ 2,823 = 7

19,761 ÷ 6,587 = 3

19,761 ÷ 19,761 = 1

Thus, we describe a number as divisible by another number or factor when the quotient shows a whole number and there is no remainder.

Answer:

B -0.104

Step-by-step explanation:

Step 1: Write the formula for correlation

r =    total xy

√Total x² x Total y²

Step 2: Make a table to calculate all values

Table is attached in the picture below

Step 3 : Solve

Mean of X = Total X/ Total number of X

                  = 507/12

                  = 106.33

Mean of Y = Total Y/ Total number of Y

                  = 1276/ 12  

                  = 42.25

r =    total xy

√Total x² x Total y²

r = -352.05/ √3656.25 x 3122.66698

r = -0.104

-0.104 is negative

This negative correlation means there is an inverse correlation between variables.

Answer:

B. According to this data, there is a negative correlation between age and IQ.

Step-by-step explanation:

Correlation shows the strength of relation between two variables. The formula used to calculate correlation is:

[tex]Correlation(r) = \frac{Cov(x, y)}{\sigma_{x}\sigma_{y}}= \frac{E(x-\mu_{x})(y-\mu_{y})}{\sigma_{x}\sigma_{y}}[/tex]

where, Cov(x,y) = Covariance of x and y

[tex]\sigma_{x} [/tex] = standard deviation of x

[tex]\sigma_{y} [/tex] = standard deviation of y

[tex]\mu_{x} [/tex] = mean of x

[tex]\mu_{y} [/tex] = mean of y

and, E denotes the Expectation.

The value of the correlation lies between -1 to +1.

If the value of correlation lies between -1 to 0 then it is known as a negative correlation.

and, If the value of correlation lies between 0 to 1 then it is known as a positive correlation.

Using the above formula of correlation we get Correlation (r) = -0.1225.

Thus, there is negative correlation between age and IQ.

We can also use a correlation calculator for getting the value of correlation.

Hence, option (B) is correct.

Answer:

No

Step-by-step explanation:

In order to be the lengths of sides of a triangle:

Sum of any two side lengths must always be greater than the third side.

Here,

[tex]1 + 2 = 3 \ngtr 5 \\ [/tex]

Hence, 1, 2, 5 can't be lengths of triangle.

By the Pythagorean theorem [tex]a^2+b^2=c^2[/tex], the length of BC [tex]=\sqrt{22^2+120^2}=122[/tex]

Answer:    D. 122

Step-by-step explanation:  The given polygon is a right triangle, and to calculate any length of any side in a triangle we use Pythagorean Theorem. According to Pythagorean Theorem, the right triangle consists of one hypotenuse that is opposite to the right angle and two other sides that lie at an right angle. From this comes the relationship that always applies to the right triangles, that the area of the square located on the hypotenuse is equal to the sum of the areas of the squares that are located on the other two sides.

Pythagorean Theorem can also be expressed using the equation:

a² + b² = c²

where c is the hypotenuse and a and b are the other two sides of the right triangle.

According to the given triangle, the length of the BC side is the length of the hypotenuse we are looking for, while the lengths of the sides a and b are given, a = 22 and b = 120.

Using Pythagorean Theorem, hypotenuse BC is equal to

c² = a² + b² = 22² + 120² ⇒ c = √(22² + 120²) = √(484 + 14400) =  √14884

c = 122

Answer:

x^4+2x^2y+y^2

Step-by-step explanation:

first we expand the brackets

(x^2+y)(x^2+y)

the it will become

x^4+x^2y+yx^2+y^2

then finally the answer will become

,x^4+2x^2y+y^2

Answer:

x⁴+2x²y+y²

Step-by-step explanation:

Given the equation( x²+y)², to expand, we will open the bracket by multiplyimg the function x²+y by itself to have;

(x²+y)² = (x²+y)(x²+y)

(x²+y)² = x⁴+x²y+x²y+y²

(x²+y)² = x⁴+2x²y+y²

Therefore the expansion form of (x²+y)² is x⁴+2x²y+y²

The measure of angle C in triangle ABC, given that the measure of angle a is 24 degrees and angle b is 130 degrees, is 26 degrees.

To find the measure of angle C in triangle ABC, we use the fact that the sum of the angles in a triangle is 180 degrees. Given the measure of angle a is 24 degrees and angle b is 130 degrees, we can add these two measures and subtract from 180 degrees to find the measure of angle C.

Therefore, the measure of angle C in triangle ABC is 26 degrees.

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Answer:

3 people

Step-by-step explanation:

We can write a proportion, putting lbs of beef over people

21 lbs            7 lbs

-----------   = ------------

9 people         x people

Using cross products

21x = 7*9

21x = 63

Divide each side by 21

21x/21 = 63/21

x =3

You can have 3 people

For the equation cross multiplication is key. i do recommend you take in the fact it takes 2.3333etc. to make each persons portion

but none the less the quation should look like 7x9=63 then 63/21 which gives you 3.

you could also do 12/9=2.3, then 7/2.3= 3.04 for a more accurate answer

Answer: Option 'A' is correct.

Step-by-step explanation :

Since we have given that

Number of medals = 2

Number of runners = 8

We need to find the number of ways to award the medals.

We would use "fundamental theorem of counting" to find the number of ways.

So, number of ways is given by

8 × 7 = 56

Hence, option 'A' is correct.

Answer:

A. 56

Step-by-step explanation:

You take 8 and then find the next number down and multiply them.

8*7= 56

(Also, I just did this on APEX)

Answer:

67 boards

Step-by-step explanation:

Given :

Total board length = 814 ft

Each board must be exactly 12 feet

Number of 12 ft boards which can be cut from 814 feet,

= 814 ÷ 12

= 67.83 boards

But because the question requires boards which are exactly 12 feet long, so we have to round down to the nearest whole number

hence 67.83 boards rounded down to the nearest whole board becomes 67 boards.

Answer:

[tex]1024 {\pi} \: {unit}^{2} [/tex]

units

Answer:

1024 π units square

Step-by-step explanation:

The area of a circle is found by the formula:

Area of Circle = π × [tex]r^{2}[/tex] units square

where r is the radius of a circle

And π is a Greek letter it is a constant whose approximate value is equal to 3.14159 or 22÷7 is also used sometimes.

The area has a square unit this means if the radius is given in meter then Area has unit meter square.

The area can also be determined by diameter whose formula is given by,

Area of Circle = (π ÷ 4 )× (d)² units square

where d is the radius of a circle

Therefore here,

Area of Circle C = π × r × r

                          = π × 32 × 32 (unit)²

                          = 1024 π (unit)²

Thus, the last option is correct and first four given option is not correct.

Circumference of a circle is found by 2×π×r, where π and r are same as defined above. This is usually determined when we have to ask to find the length of a given boundary in a question.

and Area is found when

We can also derive the formula of a circle which is given by Archimedes, here we consider the circle as the limit of a sequence of regular polygons. And the Area of a regular polygon can be found by half of a perimeter of the circle (i.e. 2×π×r ) multiplied by the distance from its center to its sides i.e. 1÷2×(2×π×r)×r.

Answer:

=12 units

Step-by-step explanation:

When a square is cut along one diagonal, it forms a right angled triangle whose legs are the sides of the square and the hypotenuse is the diagonal of the square.

Therefore, the Pythagoras theorem is used to find the hypotenuse.

a² + b² = c²

(6√2)²+(6√2)²=c²

72+72=c²

c²=144

c=√144

=12

The diagonals of the square measure 12 units each.

Answer:

The distance is [tex]3\sqrt{2}\ units[/tex]

Step-by-step explanation:

step 1

Find the slope of the give line

we have

y=x+2

so

the slope m is equal to

m=1

step 2

Find the slope of the perpendicular line to the given line

Remember that

If two lines are perpendicular, then their slopes are opposite reciprocal of each other

so

we have

m=1 -----> slope of the given line

therefore

The slope of the perpendicular line is equal to

m=-1

step 3

With m=-1 and the point (8,4) find the equation of the line

y-y1=m(x-x1)

substitute

y-4=-(x-8)

y=-x+8+4

y=-x+12

step 4

Find the intersection point lines y=x+2 and y=-x+12

y=x+2 -----> equation A

y=-x+12 ----> equation B

Adds equation A and equation B

y+y=2+12

2y=14

y=7

Find the value of x

y=x+2 -----> 7=x+2 -----> x=5

The intersection point is (5,7)

step 5

Find the distance between the point (8,4) and (5,7)

we know that

The distance from the point (8,4) to the line y=x+2 is equal to the distance from the point (8,4) to the point (5,7)

Find the distance AB

the formula to calculate the distance between two points is equal to

[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]

substitute

[tex]d=\sqrt{(7-4)^{2}+(5-8)^{2}}[/tex]

[tex]d=\sqrt{(3)^{2}+(-3)^{2}}[/tex]

[tex]d=\sqrt{18}[/tex]

[tex]d=3\sqrt{2}\ units[/tex]

see the attached figure to better understand the problem

Answer:

associative property

Step-by-step explanation:

This illustrates the associative property.  It doesn't matter in which order you combine the terms here.

This is an example of associative property which states,

[tex]a+(b+c)=(a+b)+c[/tex]

Hope this helps.

r3t40

[tex]\huge{\boxed{54-x}}[/tex]

The difference is the result of a subtraction problem.

We are given two values that are being subtracted: 54 and a number, represented by [tex]x[/tex]

So, represent this mathematically with [tex]\boxed{54-x}[/tex].

54-x is the correct answer, the difference between number is x-54 or 54-x and the number of algebraic expressions subtracted or number symbol like x.

x^3 + 7x^2 -8x -3x^2 -21x +24

x^3 + 4x^2 -29x +24

For this case we must simplify the following expression:

[tex](x-3) (x ^ 2 + 7x-8)[/tex]

We must apply distributive property:

[tex]x * x ^ 2 + x * 7x-8 * x-3 * x ^ 2-3 * 7x + 3 * 8 =\\x ^ 3 + 7x ^ 2-8x-3x ^ 2-21x + 24 =[/tex]

Adding similar terms we have:

[tex]x ^ 3 + 4x ^ 2-29x + 24[/tex]

Answer:

The simplified expression is:

[tex]x ^ 3 + 4x ^ 2-29x + 24[/tex]

Answer:

7560 million

Step-by-step explanation:

here is the answer for your question

Answer:

The camera should low by 12 meters

Step-by-step explanation:

* Lets explain how to solve the problem

- From the figure:

# The length of the camera is represented by FE

∴ EF = 20 meters

# The ground distance covered by the camera represented by AC

∴ AC = 125 meters

# The camera will be flown at an altitude represented by DB

∴ DB = 75 meters

# The altitude should the camera hanged below the blimp

   represented by GD

∴ Find the length of GD

* Lets solve the problem

- In the two triangles ADC and EDF

∵ EF // AC

∴ m∠A = m∠E ⇒ alternate angles

∴ m∠C = m∠F ⇒ alternate angles

∵ m∠ADC = m∠EDF ⇒ vertical angles

∴ Δ ADC ≈ Δ EDF ⇒ AAA similarity

∴ Their corresponding sides are proportions

∴ AC/EF = AD/ED = CD/FD = constant ratio

∵ AC = 125 and EF = 20

∴ The constant ratio is 125/20 = 25/4

∵ Their Altitudes have the same ratio of their corresponding sides

∵ BD is the altitude of Δ ADC and GD is the altitude of Δ EDF

∴ BD/GD = 25/4

∵ BD = 75

∴ 75/GD = 25/4

- Use cross multiplication to find GD

∴ 25 GD = (75)(4)

∴ 25 GD = 300

- Divide both sides by 25

∴ GD = 12

∴ The camera should low by 12 meters

The camera should low by 12 meters

Answer: [tex]x=128\°[/tex]

Step-by-step explanation:

It is important to remember the following:

[tex]Angle\ formed\ by\ two\ chords=\frac{1}{2}(Sum\ of\ intercepted\ arcs)[/tex]

In this case you can observe in the figure that "x" is an Angle formed by two chords, therefore, you can find its value applying the formula.

Therefore, the value of "x" is this:

[tex]x=\frac{1}{2}(202\°+54\°)\\\\x=\frac{1}{2}(256\°)\\\\x=128\°[/tex]

Answer:

The area of triangle ACD is 4 centimeters squared.

Step-by-step explanation:

The formula to find the area of a triangle is 1/2 * base * height. The base of this triangle is 2 cm and the height is 4 cm, so you can multiply that and then the answer by half.

Area = 1/2 * 4 * 2

= 1/2 * 8

= 4

Answer: 4 cm squared.

Hope this helped :)

Check the picture below.

Answer:

i) 4π

ii) An isosceles triangle

iii) 8 cm^2[/tex]

iv)  [tex](4\pi - 8)cm^2[/tex]

Step-by-step explanation:

The radius of the circle is 4 cm and the measure of the central angle is 90°.  

We know that the area of sector of a circle = [tex]\frac{central angle}{360} *\pi *r^2[/tex]

Given: r = 4 and central angle = 90

Now plug in these values in the above formula, we get

Area of the sector = [tex]\frac{90}{360} *\pi *4^2\\= \frac{1}{4} *\pi *16\\= 4\pi[/tex]

i) 4π

ii) In the triangle, the two sides are equal in measure, because the two sides represents the radius of the circle. The radius are the same in measure in a circle.

Therefore, the triangle is the second is an isosceles triangle.

iii) Area of a right triangle = [tex]\frac{1}{2} *base*height[/tex]

Here base = 4 and height = 4, plug in these values in the triangle formula, we get

The area of the triangle = [tex]\frac{1}{2} *4*4\\= 2*4\\= 8 cm^2[/tex]

iv) The area of the segment of the circle is (4π - area of the triangle).

= [tex](4\pi - 8)cm^2[/tex]

The area of a sector is calculated using:

[tex]A = \frac{\theta}{360} \times \pi r^2[/tex]

So, we have:

[tex]A = \frac{90}{360} \times \pi \times 4^2[/tex]

[tex]A = \frac{1}{4} \times \pi \times 4^2[/tex]

[tex]A = 4\pi[/tex]

Hence, the area of the sector is [tex]4\pi[/tex]

One of the angles in the triangle is 90 degrees.

So, the triangle is a right-angled triangle

The area of the triangle is then calculated as:

[tex]A = \frac 12 bh[/tex]

This gives

[tex]A = \frac 12 \times 4 \times 4[/tex]

[tex]A = 8[/tex]

Hence, the area of the triangle is 8, and the triangle is a right triangle

This is the difference between the areas of the circle and the triangle.

So, we have:

[tex]A = 4\pi - 8[/tex]

Hence, the area of the segment is [tex] 4\pi - 8[/tex]

Read more about areas at:

https://brainly.com/question/14283575

Answer:

x = 8 + 7y

Step-by-step explanation:

Given

x - 7y = 8 ( isolate x by adding 7y to both sides )

x = 8 + 7y

Linear equation is the equation in which the highest power of the unknown variable is one.The value of the variable x for the given expression is,

[tex]x=7y+8[/tex]

The given linear equation is,

[tex]x-7y=8[/tex]

Linear equation is the equation in which the highest power of the unknown variable is one. The linear equation are used to find out the value of unknown variable.

In the above linear equation the coefficient of the variable x is one and the coefficient of the variable y is negative seven.

The number eight is the constant which is equal to the given expression of variables.

To solve the equation for x refers to get the value of the variable x. As there is only one linear equation and the unknown variables are two. Thus the value of variable x can be obtained in the form of the variable y.

Let solve the given equation,

[tex]x-7y=8[/tex]

Add [tex]7y[/tex] both sides of the equation. thus,

[tex]x=8+7y[/tex]

[tex]x=7y+8[/tex]

Thus the value of the variable x for the given expression is,

[tex]x=7y+8[/tex]

Learn more about the linear equation here;

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For this case we must write as a percentage the following expression:

[tex]\frac {21} {25}[/tex]

Dividing we have to:

[tex]\frac {21} {25} = 0.84[/tex]

Now we multiply by 100%. So:

[tex]0.84 * 100 =[/tex]

We run the decimal two spaces to the right, finally we have:

84%

Answer:

84%

[tex]\text{Hey there!}[/tex]

[tex]\text{Percentages usually run out of 100}[/tex]

[tex]\dfrac{21}{25}\ = \ 21\div25\ = \ 0.84[/tex]

[tex]\huge\text{Decimal form: 0.84}[/tex]

[tex]\text{Remember what I said, percentages run out 100. ( e.g. x * 100)}[/tex]

[tex]\text{0.84\% }\times\text{ 100 = 84\%}[/tex]

[tex]\boxed{\boxed{\huge\text{Answer: 84\%}}}\huge\checkmark[/tex]

[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]

~[tex]\frak{LoveYourselfFirst:)}[/tex]

Answer:

4

Step-by-step explanation:

Pounds of salt : gallons of water

(2 : 9) x 2

4 : 18

- 4 pounds

Answer:

The vertex is the point (-5,3)

Step-by-step explanation:

we know that

The equation of a vertical parabola in vertex form is equal to

[tex]y=a(x-h)^{2}+k[/tex]

where

a is a coefficient

(h,k) is the vertex

If a > 0 the parabola open upward and the vertex is a minimum

If a < 0 the parabola open downward and the vertex is a maximum

In this problem we have

[tex]y=2(x+5)^{2}+3[/tex]

a=2

so

the parabola open upward and the vertex is a minimum

h=-5, k=3

therefore

The vertex is the point (-5,3)

Answer:

[tex]\dfrac{3}{2}[/tex]

Step-by-step explanation:

If 2x - 3 is a factor of P(x), then  3/2 is a zero of P(x).

[tex]\begin{array}{rcl}2x - 3 & = & 0\\2x & = & 3\\\\x & = & \mathbf{\dfrac{3}{2}}\end{array}\\\\\mathbf{P(\frac{3}{2})} \text{ will equal zero if $(2x-3)$ is a factor of $P(x)$}[/tex]

Answer:

4/5

Step-by-step explanation:

you need to find the common denominator first, being 15.

then you can do 4/15, 6/15, 8/15, 10/15 making the next one 12/15 or simplified 4/5

Answer:

[tex]\large\boxed{\dfrac{4}{5}}[/tex]

Step-by-step explanation:

Find LCD:

LCM of 15, 5 and 3 is 15

15 = (15)(1)

15 = (5)(3)

15 = (3)(5)

[tex]\dfrac{2}{5}=\dfrac{2\cdot3}{5\cdot3}=\dfrac{6}{15}\\\\\dfrac{2}{3}=\dfrac{2\cdot5}{3\cdot5}=\dfrac{10}{15}[/tex]

Therefore we have:

[tex]\dfrac{4}{15},\ \dfrac{2}{5},\ \dfrac{8}{15},\ \dfrac{2}{3}\to\dfrac{4}{15},\ \dfrac{6}{15},\ \dfrac{8}{15},\ \dfrac{10}{15}[/tex]

Look at the numerators. The next numerator is created from the previous one by adding the number 2.

Therefore the next fraction is equal to

[tex]\dfrac{10+2}{15}=\dfrac{12}{15}=\dfrac{12:3}{15:3}=\dfrac{4}{5}[/tex]

[tex]\bf \begin{array}{llll} \stackrel{miles}{x}&\stackrel{cost}{y}\\ \cline{1-2} 0&2.75+1.50(0)&\leftarrow \textit{initial fee}\\ 1&2.75+1.50(1)\\ 2&2.75+1.50(2)\\ 3&2.75+1.50(3)\\ 4&2.75+1.50(4)\\ x&2.75+1.50(x)\\ \end{array}~\hspace{7em}\boxed{y=2.75+1.5x}[/tex]

Answer:

A: second one or middle choice

B: (5x + 8)(3x - 2)

Step-by-step explanation:

First question (A)

It is a trinomial. You can't use the difference of squares on it. The difference of squares have two terms as an answer.

It is not a perfect square. 15 is not a perfect square and c would have to be positive not minus to even think about using a perfect square.

So the A answer is the second one. You need two different binomials to factor this.

Second Question

You could try all the possible pairings and solve them by brute force.

The are five choices the go with the first one (3x + 4). Eventually you would get the answer, you would have to try 5 + 4 + 3 + 2 + 1 = 15 attempts.

There must be a shorter way.

14 means that the expressions are fairly far apart. This was just luck on my part. There is no logic. 8 and 2 for 16 are fairly far apart.

(5x + 8)(3x - 2)

The middle term is 8*3x - 2*5x = 14x and that looks like the answer.

Answer:

55

Step-by-step explanation:

bisect means to cut in half so it is half of 110 so it is 55

Answer:

I believe the answer is 55°.

Step-by-step explanation:

Sense line Y is cut between angle AXB, you would need to find the half of 110°.

So, 110 ÷ 2 = 55.

Therefore, 55° is the correct answer.