Karen has $1.70 in coins. Karen has 8 coins, all of which are quarters or dimes.

So can someone help me with these 3 parts?

Answer:

[tex]y=-4x+5[/tex]

Step-by-step explanation:

Step 1:  Find the slope

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

[tex]m=\frac{13-5}{-2-0}[/tex]

[tex]m=-\frac{8}{2}[/tex]

[tex]m=-4[/tex]

Step 2:  Use point slope form

[tex](y-5) = -4(x-0)[/tex]

[tex]y-5 + 5=-4x + 5[/tex]

[tex]y=-4x+5[/tex]

Answer:  [tex]y=-4x+5[/tex]

y=-4x+5

Step-by-step explanation:

Step 1:  Find the slope

m=\frac{y_2-y_1}{x_2-x_1}

m=\frac{13-5}{-2-0}

m=-\frac{8}{2}

m=-4

Step 2:  Use point slope form

(y-5) = -4(x-0)

y-5 + 5=-4x + 5

y=-4x+5

Answer:

The system has no solutions

Step-by-step explanation:

we have

[tex]4x-5y=5[/tex] -----> equation A

[tex]-0.08x+0.10y=0.10[/tex] ----> equation B

Isolate the variable y in the equation A

[tex]5y=4x-5[/tex]

[tex]y=\frac{4}{5}x-1[/tex]

[tex]y=0.8x-1[/tex] -----> equation A'

Isolate the variable y in equation B

[tex]0.10y=0.08x+0.10[/tex]

[tex]y=\frac{0.08}{0.10}x+1[/tex]

[tex]y=0.8x+1[/tex] ------> equation B'

Compare the equations A' and B'

The lines have the same slope but different y-intercept

Are parallel lines

therefore

The system has no solutions

Answer:

A. no solutions

Step-by-step explanation:

100% on edge

Answer:

perimeter of the shaded region = 88 +44+28 =160 cm

Step-by-step explanation:

perimeter of shaded region = length AO + arc OB + arc AB

length AO = radius of bigger circle

radius of bigger circle = OX + OB = 2×radius of smaller circle = 2×14 cm = 28 cm

therefore AO = 28 cm

length of arc oB= half of circumference of smaller circle = [tex]\pi[/tex]×14 = 44 cm

length of arc ab = half of circumference of bigger circle  = [tex]\pi[/tex]×28 =[tex]\frac{22}{7}[/tex]×28= 88

therefore perimeter of the shaded region = 88 +44+28 =160 cm

area of the shaded region = half of area of bigger circle - half of area of smaller circle

                                           =[tex]\frac{1}{2} \pi 28^{2} -\frac{1}{2} \pi 14^{2}[/tex]

                                           =[tex]\frac{\pi }{2} (28^{2} -14^{2} )[/tex]

  solving we gen area of shaded region = 924

Answer:

Rose is 34.

Anne is 14.

Step-by-step explanation:

Let rose be x years age now and anne be y years old now. Then:

x + 6 = 2 (y + 6)

x - 4 = 3(y - 4)

Subtracting:

6 - -4 =  2y + 12 - (3y - 12)

10 = - y + 24

-y = -14

y = 14

Substituting for y:

x + 6 = 2(14+6)

x = 40 - 6 = 34.

The 24th term is 152

Step-by-step explanation:

The formula of the nth term of an arithmetic sequence is:

[tex]a_n=a+(n-1)d[/tex] , where

The third term means n = 3

∵ [tex]a_3=a+(3-1)d[/tex]

∴ [tex]a_3=a+2d[/tex]

∵ [tex]a_3[/tex] = 5

- Equate the right hand sides of the third term

∴ a + 2d = 5 ⇒ (1)

The fifth term means n = 5

∵ [tex]a_5=a+(5-1)d[/tex]

∴ [tex]a_5=a+4d[/tex]

∵ [tex]a_5[/tex] = 19

- Equate the right hand sides of the fifth term

∴ a + 4d = 19 ⇒ (2)

Now we have a system of equations to solve it

Subtract equation (1) from equation (2) to eliminate a

∴ 2d = 14

- Divide both sides by 2

∴ d = 7

- Substitute the value of d in equation (1) to find a

∵ a + 2(7) = 5

∴ a + 14 = 5

- Subtract 14 from both sides

∴ a = -9

The twenty fourth term means n = 24

∵ a = -9 and d = 7

- Substitute the values of a and d in the formula of the nth term

∴ [tex]a_24=-9+(24-1)(7)[/tex]

∴ [tex]a_24=-9+(23)(7)[/tex]

∴ [tex]a_24=-9+161[/tex]

∴ [tex]a_24=152[/tex]

The 24th term is 152

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Answer: 34

Step-by-step explanation:

The average rate of change of f(x)= x³-9x in interval [1,6] is 34.

If f(x) is a function the [a,b] is interval then the average rate of change is [tex]\frac{f(b)-f(a)}{b-a}[/tex]

Given the function is f(x)= x³-9x and the interval is [1,6].

then first we have to find the value of f(1) and f(6).

So  

f(1) = (1)³-9(1)

    = 1-9

    = -8

and

f(6) = (6)³-9(6)

    = 216- 54

    = 162

therefore average rate of change of f is

[tex]\frac{f(6)-f(1)}{6-1}= \frac{162+8}{6-1}[/tex]

              = 170/5

              = 34

Hence the average rate of change of f is 34.

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Answer:

42÷227=42/227

Step-by-step explanation:

Answer:

0.185

Step-by-step explanation:

Do the long division.

Answer: Two lines of equal length

A point equidistant from two end points

Step-by-step explanation:

The mid - point of a line segment  is the point on the segment that is equidistant from the endpoints.

It is not equidistant to all point on the segment , it is only equidistant from the endpoints.

With this , the first option is out.

The midpoint of a line divides the line into two equal part , so the second option holds and the third option holds too.

Answer:

115.1

Step-by-step explanation:

Answer:

The zeros are 4, -6, and 1.

Step-by-step explanation:

Given f(x) = x³ + x² - 26x + 24

(x - 4) is a factor of f(x). That means it is a zero of f(x).

To find the remaining factors algebraically, we take out the factor (x - 4) from f(x).

That is, [tex]$ f(x) = x^3 + x^2 - 26x + 24 $[/tex]

[tex]$ \implies x^3 - 4x^2 + 5x^2 - 20x - 6x + 24 $[/tex]

Taking [tex]$ x^2 $[/tex] out, we have:

[tex]$ = x^2(x^2 - 4) + 5x(x - 4) - 6(x - 4) $[/tex]

Taking (x - 4) common out, we have:

[tex]$ = (x - 4) \{x^2 + 5x - 6\} $[/tex]

[tex]$ = (x - 4)(x^2 + 6x - x - 6) $[/tex]

[tex]$ = (x - 4)\{x(x + 6) -1(x + 6)\} $[/tex]

[tex]$ = (x - 4)(x + 6)(x - 1) $[/tex]

This means the zeros are 4, -6, & 1.

Answer:

3/2

Step-by-step explanation:

(3/4)/(1/2)=(3/4)(2/1)=6/4=3/2

Answer: in decimal form it is 0.375

Step-by-step explanation:

Answer:

y=-1/3x+5/2

Step-by-step explanation:

Slope intercept form makes this a breeze. Essentially, just plug these values into the following formula:

y = [SLOPE]x + [Y-INTERCEPT]

Answer:

y=-1/3x+5/2

Hope this helps

Answer: b= -3

Step-by-step explanation:

Answer:

x=-19/3

Step-by-step explanation:

(3x-1)/4=-5

3x-1=-5*4

3x-1=-20

3x=-20+1

3x=-19

x=-19/3

Answer:

Step-by-step explanation:

3x-1/4=-5

3x-0.25=-5

3x=-5.25

x=-1.75

This looks confusing. Can you try reposting this to make it look clear?

Answer:

[tex]-\frac{1}{4} sin(x)+\frac{1}{6} sin(3x)-\frac{1}{20} sin(5x)+C[/tex]

Step-by-step explanation:

We begin with the integral [tex]\int{sin^2(x)cos(3x)} \, dx[/tex]

First, we can apply the power reducing formula to [tex]sin^2(x)[/tex]

This formula states: [tex]sin^2(x)=\frac{1}{2} -\frac{1}{2} cos(2x)[/tex]

This gives us

[tex]\int{(\frac{1}{2} -\frac{1}{2} cos(2x))(cos(3x)} \, dx \\\\\int{(\frac{1}{2}cos(3x) -(\frac{1}{2} cos(2x)cos(3x)} \, dx \\\\\frac{1}{2} \int{cos(3x)} \, dx -\frac{1}{2} \int{cos(2x)cos(3x)} \, dx[/tex]

Now, we can use integrate the first integral

[tex]\frac{1}{2} \int{cos(3x)} \, dx\\u=3x\\du=3dx\\\\\frac{1}{6} \int{3cos(u)} \, du\\\\\frac{1}{6} sin(u)+C\\\\\frac{1}{6} sin(3x)+C[/tex]

And now we can begin to integrate the second

[tex]-\frac{1}{2} \int{cos(2x)cos(3x)} \, dx[/tex]

To integrate this, we need to use the Product-to-sum formula, which states

[tex]cos(\alpha )cos(\beta )=\frac{1}{2} [cos(\alpha +\beta )+cos(\alpha -\beta )[/tex] . For this formula, we will use [tex]\alpha =3x\\\beta =2x[/tex]

This gives us

[tex]-\frac{1}{2} \int{\frac{1}{2}[cos(5x)+cos(x)] } \, dx \\\\-\frac{1}{4} \int{[cos(5x)+cos(x)] } \, dx\\\\-\frac{1}{4}\int{cos(5x)} \, dx -\frac{1}{4}\int{cos(x)} \, dx[/tex]

We can then use the same process of u-substitution as the previous to get the answer of [tex]-\frac{1}{20} sin(5x)-\frac{1}{4} sin(x)+C[/tex]

Lastly, we can add the values of the two integrals together to give us the final solution of

[tex]-\frac{1}{4} sin(x)+\frac{1}{6} sin(3x)-\frac{1}{20} sin(5x)+C[/tex]

Answer:

x=-3

Step-by-step explanation:

2x+7=4+x

2x-x+7=4

x+7=4

x=4-7

x=-3

Answer:

13/20 of her money was spent.

Step-by-step explanation:

To find the answer you have to add these two fractions together, and to do that you must find a common denominator.

For this problem I chose to use 20 for the denominator since it is the smallest number that both 4 and 5 have in common.

Keep in mind that, whatever you do to the denominator, you must also do to the numerator, so if you multiply 5 by 4, you must also multiply 2 by 4.

5/20 + 8/20 = 13/20

Answer:

The are certain things that need to be carefully observed when you add or combine the polynomials. Here is the list of certain rules for adding/combining polynomials.

Step-by-step explanation:

The are certain things that need to be carefully observed when you add or combine the polynomials - especially the polynomials with more than one variable.

Here are some of the rules for adding polynomials:

Lets add and simplify the following polynomials.

(4x + 7y) + (5x – 3y)

4x + 7y + 5x – 3y

4x + 5x + 7y - 3y

9x + 4y

So, 9x + 4y is the answer.

Note: I can not further combine or add 9x + 4y as they are un-like. The reason is simple; un-like polynomials have different variables.

The polynomials can be add vertically too.

Here is the vertical method of adding (4x + 7y) and (5x – 3y) .

4x    +7y

5x     -3y

________

9x + 4y

________

Keywords: add, combine, polynomials

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Answer:

The speed of slower car is 55 miles per hour.

Step-by-step explanation:

Given as :

The speed of slower car = [tex]s_2[/tex] = s  mph

The speed of faster car = [tex]s_1[/tex] = ( s + 20 ) mph

The distance cover by slower car = [tex]d_2[/tex] = 165 miles

The distance cover by faster car = [tex]d_1[/tex] = 225 miles

The time taken by both cars for travelling = t hours

The speed of the cars remains constant

Now, According to question

∵ Time = [tex]\dfrac{\textrm Distance}{\textrm Speed}[/tex]

So, For slower car

t = [tex]\dfrac{d_2}{s_2}[/tex]

Or, t = [tex]\dfrac{165}{s}[/tex]           ............1

So, For faster car

t = [tex]\dfrac{d_1}{s_1}[/tex]

Or, t = [tex]\dfrac{225}{s+20}[/tex]           ............2

Now, equating both the equations

I.e  [tex]\dfrac{225}{s+20}[/tex] = [tex]\dfrac{165}{s}[/tex]  

By cross multiplying

Or, 225 × s = 165 × (s + 20)

Or, 225 s = 165 s + 3300

Or, 225 s - 165 s = 3300

Or, 60 s = 3300

∴  s = [tex]\dfrac{3300}{60}[/tex]

I.e s = 55 miles per hour

So , The speed of slower car = [tex]s_2[/tex] = s = 55 miles per hour

Hence , The speed of slower car is 55 miles per hour.  Answer

If an average person listens to music for 1,000 hours in a year, the probability that the component lasts for more than 3 years is 2.3%.

In Mathematics and Statistics, the z-score of a given sample size or data set can be calculated by using the following formula:

Z-score, z = (x - μ)/σ

Where:

σ represents the standard deviation.

x represents the sample score.

μ represents the mean score.

Since an average person listens to music for 1,000 hours in a year, the total life span of the component for 3 years can be calculated as follows;

Total life span = 3 × 1000

Total life span = 3000 years.

By substituting the parameters into the z-score formula, we have the following:

Z-score, z = (3000 - 2400)/300

Z-score, z = 2.0

Based on the standardized normal distribution table, the required probability is given by:

P(X > 3000) = P(x > Z)

P(X > 3000) = 1 - P(Z < 2)

P(X > 3000) = 1 - 0.9773

Probability = 0.0227 × 100.

Probability = 2.27 ≈ 2.3%.

Answer:

l-5l < l-6l

Step-by-step explanation:

the absolute will remove the negative of both numbers

Answer: |−5| < |−6|

Step-by-step explanation:

The function of the absolute symbol is to cancel out negative , considering the values one after the other.

/ - 6/ < 5  is the same as 6 < 5 ....... this is not true

(ii) /-6/ < /5/ is the same as 6 < 5 ..... this is not true

(iii) /-5/ < / -6/ is the same as 5 < 6 ...... this is true

(iv) /-5/ < -6 is the same as 5 < -6 ..... this is not true

Answer:

Step-by-step explanation:

Answer:

56.3 in²

Step-by-step explanation:

Given 2 similar figures with linear ratio = a : b, then

area ratio = a² : b²

Here linear ratio = 4 : 3, thus

area ratio = 4² : 3² = 16 : 9

Let x be the surface area of the smaller can then by proportion

[tex]\frac{16}{100}[/tex] = [tex]\frac{9}{x}[/tex] ( cross- multiply )

16x = 900 ( divide both sides by 16 )

x ≈ 56.3 in² ( to the nearest tenth )

The surface area of the smaller can is approximately 56.3 square inches.

The student's question involves finding the surface area of a smaller can based on its similarity ratio to a larger can. Given that the ratio of the corresponding linear measures of two similar cans is 4:3 and the larger can has a surface area of 100 square inches, we can determine the surface area of the smaller can by using the square of the ratio between their sizes. Since the ratio of their surface areas is the square of their linear dimensions ratio, we can set up the calculation as follows:

[tex](3/4)^2 = x/100,[/tex]

where x represents the surface area of the smaller can. Solving for x:

[tex](3/4)^2 = (9/16) = x/100,[/tex]

x = (9/16) * 100,

x = 56.25.

Therefore, the surface area of the smaller can is approximately 56.3 square inches when rounded to the nearest tenth.

Answer:

length = x + 5

Step-by-step explanation:

Given

area = x² + 8x + 15 and area = length × width

We require to factorise x² + 8x + 15

Consider the factors of the constant term (+ 15) which sum to give the coefficient of the x- term (+ 8)

The factors are + 5 and + 3, since

5 × 3 = 15 and 5 + 3 = 8, thus

x² + 8x + 15 = (x + 5)(x + 3)

x + 3 is the width, thus x + 5 is the length

bisect = to cut into two equal halves.

so from that theorem Juan used we can derive that once both diagonals bisect each other, the halves of AO = OC and DO = OB.

Answer:

[tex]\frac{8}{17}[/tex]

Step-by-step explanation:

The total length of CF is 17 units and the length of DE is 8 units, so the probability of p being on DE is [tex]\frac{8}{17}[/tex]

Answer:

8/17 is correct.

Step-by-step explanation:

Answer:

The lateral Area of a cube [tex]= 17.64in^{2}[/tex]

Step-by-step explanation:

In Mathematics Geometry, the lateral surface of a solid object like cube would be the face of the sold on its side, excluding base. Meaning, any surface, apart from base, would be included to determine the lateral surface of the solid.

A cube has six sides - also called faces.

A cube has a base i.e. the bottom side of the cube, and an ant-bottom base i.e. the top side of the cube.

So, lateral area of a cube would exclude both bottom side base and anti-bottom side base. In other words, it is the area of all the sides of the object, excluding the area of its base and top.

Hence, lateral area of a cube is the square of all the remaining four sides of the object, excluding the area of its base and top.

Hence, the lateral area of a cube can be calculated by the formula:

Lateral Area of a cube [tex]= 4s^{2}[/tex], where s is the length of one edge.

So,

As the given length of edge = s = 2.1

So,

lateral Area of a cube [tex]= 4s^{2}[/tex]

                                     [tex]= 4(2.1)^{2}[/tex]

                                     [tex]= 17.64in^{2}[/tex]

Keywords: cube, lateral area

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Answer:

2a² - 2b - 1

Step-by-step explanation:

Given

- 5 + b + 2a² - 3b + 4 ← collect like terms

= 2a² + (b - 3b) + (- 5 + 4)

= 2a² + (- 2b) + (- 1)

= 2a² - 2b - 1

Exponential functions are something like y = 2^x where the variable is in the exponent (ie the exponent isnt a fixed number). What is given here, y = 3x^3, is a cubic function. You can also call this a power function. Power functions are of the form a*x^b, where a & b are constants.