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1. 13y + 2 - 2y = 10y + 3 - y
2. 9(3y +7) - 2 = 3(-9y +9)
3. 32.1y + 3.1 + 2.4y - 8.2 = 34.5y - 5.1

Answer: A square pyramid has 5 faces, 8 edges, and 5 vertices.

Step-by-step explanation:

The required answer is a square pyramid (excluding the base) has four faces. A square pyramid consists of a square base and triangular faces that meet at a common vertex.

To determine the number of faces excluding the base, we can follow these steps:

Step 1: Identify the number of triangular faces.

In a square pyramid, there are four triangular faces that connect each corner of the square base to the apex (the top vertex). These triangular faces do not include the base.

Step 2: Determine the total number of faces.

In addition to the triangular faces, we need to consider the base of the pyramid. The base is a square, and it is not counted when we exclude the base. Therefore, the number of faces excluding the base is the same as the number of triangular faces.

Step 3: Calculate the number of faces.

Since we determined that a square pyramid has four triangular faces, the square pyramid (excluding the base) has four faces.

Hence, a square pyramid (excluding the base) has four faces. A square pyramid consists of a square base and triangular faces that meet at a common vertex.

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Answer:

-15x -18y =-4

Step-by-step explanation:

just add the values together, -8+-7, -3+-5 and -11+7

Answer:

-15x -18y =-4

Step-by-step explanation:

Answer:

It 42

Step-by-step explanation:

Answer:

Step-by-step explanation:

here you go

Answer:

741a + 825b + 639c = 1375/9.

Step-by-step explanation:

To solve this problem, we need to first find the values of a, b, and c that satisfy the given system of equations. We can use any method of solving systems of linear equations, such as substitution or elimination. Here, we will use the elimination method:

Multiplying the first equation by -4 and adding it to the second equation, we get:

-20b - 36c = -2

Multiplying the first equation by -7 and adding it to the third equation, we get:

29b + 45c = 8

Multiplying the second equation by -29/20 and adding it to the third equation, we get:

-21b - 39c = 67/10

Now we have three equations in two variables. We can solve for b and c using any method, such as elimination or substitution. Here, we will use substitution:

From the second equation, we can solve for a in terms of b and c:

a = (2 - 2b - 3c)/4

Substituting this expression for a into the third equation, we get:

741/4 - 825/2 b + 639/6 c = 9

Simplifying and solving for b, we get:

b = (3/5) - (3/5) c

If this helps, please mark my answer as brainliest

Substituting this expression for b into the second equation, we get:

(27/5) c = (2/5)

Solving for c, we get:

c = -(2/27)

Substituting this value of c into the expression for b, we get:

b = (3/5) - (3/5) (-2/27) = (11/27)

Substituting the values of a, b, and c into the expression 741a + 825b + 639c, we get:

741a + 825b + 639c = 741[(2 - 2b - 3c)/4] + 825b + 639c

= 741[(2 - 2(11/27) - 3(-2/27))/4] + 825(11/27) + 639(-2/27)

= 741(5/27) + 275/3 - 426/9

= 1375/9

Therefore, 741a + 825b + 639c = 1375/9.

Answer:

Step-by-step explanation:

Answer:

-13.5

Step-by-step explanation:

Answer:

-13.5

Step-by-step explanation:

Answer:

Step-by-step explanation:

ressions.

There are a few boxes with 12 red pens in each and a few boxes with 10 blue pens in each. If 10 red pens and 5 blue pens are removed, the total number of pens that remains is given by the expression (12x − 10) + (10y − 5). Here, x represents the number of boxes containing red pens and y represents the number of boxes containing blue pens.

90% of people marry there 7th grade love. since u have read this, u will be told good news 2night. if u don't pass this on nine comments ur worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of ur life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you...

The answer is 8 so its a direct proportion

I think...

The constant of Proportionality is 8.

If the ratio of one variable to the other is constant, then there is a proportional relationship between the two variables. If x and y are in a proportional relationship, then the ratio of y to x is the constant of proportionality. We can also express it as x is to y at times.

Given:

Total Baseball Caps= 30

Total amount of Cap= $240

let the number of caps sold be c.

Then, the equation is

30 c= 240

and, c= 240/30

c= 8

Hence, the constant of Proportionality is 8.

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Answer: He will arrive at 1:30

Step-by-step explanation:

Answer:  I think it would be A

Step-by-step explanation:

I just got into high school and its been hard for me and i want to do my best to help others. I would ask your teacher for help if you cant find this helpful. It seems kind of hard so i would look at A and you are going to see 4-1 i think thats a really good thing to look for cuz pwn ate 1/4 and its the same so i would go for A. If i got it wrong im so so sorry but i wish you good luck and dont give up you got this

0.75 cups of flour to 1 cup of sugar.

Step-by-step explanation: From the question, we are informed that a recipe calls for 3 cups of flour to 4 cups of sugar and told to calculate the unit rate.

It simply means what we need to calculate much flour to one cup of sugar. This will be:

= 3/4 = 0.75

Therefore, the unit rate will be:

0.75 cups of flour to 1 cup of sugar.

Answer:

-4

Step-by-step explanation:

The slope is given by

m = (y2-y1)/( x2-x1)

   = ( 13-5)/(-2 -0)

    = 8/-2

   = -4

Answer:

-4

Step-by-step explanation:

To find the slope we need to use the expression

\(\frac{y2-y1}{x2-x1}\)

For that, we need 2 coordinates

Let's use (0, 5) and (3, -7)

When you plug that in you get 5+7/0-3

When you answer it you should get -4

Answer:

The appraiser said that the condo is currently worth $202,470 and it's 2% higher than the condo was worth when Mr. Duncan bought it several years ago. To find the value of the condo when he bought it, we need to subtract 2% of the current value from the current value.

We can find 2% of the current value by multiplying it by 0.02:

$202,470 x 0.02 = $4,049.4

To find the value of the condo when he bought it, we need to subtract $4,049.4 from the current value:

$202,470 - $4,049.4 = $198,420.6

Therefore, the value of the condo when Mr. Duncan bought it was $198,420.6

Answer:

The answer is C

Step-by-step explanation:

Trust me lol. Anyway have a lovely day/night xx

Answer:

the hieght is 12.7 inches

Step-by-step explanation:

v=122.5

r=d/2

3.5/2=r

r=1.75

v=pir²h

122.5 =piR²h

122.5=pie1.75²h

okay so frist solve for r sense exponents come before multiplication in bedmask

122.5 =pi3 .06g

so then it's pie times r

122.5=9.61 *h

122.5/9.61=h

12.7=h

Answer:h≈12.73in

d Diameter

3.5

in

V Volume

122.5

in³

h

r

h

r

r

h

A

b

Using the formula

V=π(d

2)2h

Solving forh

h=V

π(d

2)2=122.5

π·(3.5

2)2≈12.7324in

Step-by-step explanation:

Answer:So I don’t know the other 5 points because you didn’t give the data about the age and number of US states named in 60 seconds, but using the 5coordinate points you gave, I was able to make this line of best fit.

So basically the units are counting up by 5.

The x axis is age in years and y axis is the number of US states named in 60 seconds.

Since you didn’t give me the data to make the other 5 points, I can’t really answer the last question, but from the graph that I did make, there are no points that would be considered outliers, and there are no clusters in sight.

(BTW THIS IS IMPORTANT!! - when you use the data to add the other 5 points, there might be an outlier or more then one outlier. And there might be a cluster. Just look at it after you graph the last 5 and change the answer I gave you if there is an outlier or cluster)

Step-by-step explanation:

Answer:

Part A

B. (11−4)+3×(11−4)−5

Part B

D. 23 songs

Step-by-step explanation:

(11−4)+3×(11−4)−5 = 23

Hope this help..

Sorry if that was wrong..

Part A

B. (11−4)+3×(11−4)−5

Part B

D. 23 songs

just give the person above be brainlyest im here to conform its right

We can divide both sides of the equation by 43 to solve for x:

90x / 43 - 47y / 43 = -49 / 43

x = -49/43

We can substitute this value for x back into either of the original equations to find y. Let's substitute it into the first equation:

-5x + 3y = -6

(-5 * -49/43) + 3y = -6

y = (-6 + 5 * 49/43) / 3

y = 17/43

The solution to the system of equations is (x, y) = (-49/43, 17/43).

To check our solution, we can substitute the values we found for x and y back into the original equations and see if they hold true.

In the first equation, -5x + 3y = -6, substituting the values we found for x and y gives us:

(-5 * -49/43) + (3 * 17/43) = -6

This simplifies to -6 = -6, which is true, so the solution holds for this equation.

In the second equation, 9x - 4y = 1, substituting the values we found for x and y gives us:

(9 * -49/43) - (4 * 17/43) = 1

This simplifies to -1 = -1, which is true, so the solution holds for this equation as well.

Therefore, the solution (x, y) = (-49/43, 17/43) is correct.

Answer:

1234567891011121314151617

Answer:

where is the question?

Step-by-step explanation:

Answer:

k = -1

Step-by-step explanation:

-3(k-8)-(k+5)=23

Distribute

-3k +24 -k-5 = 23

Combine like terms

-4k +19 = 23

Subtract 19 from each side

-4k +19-19 = 23-19

-4k = 4

Divide by -4

-4k/-4 = 4/-4

k = -1

Answer:

  k = -1

Step-by-step explanation:

Use the distributive property to eliminate parentheses. That property tells you that the outside factor multiplies each term inside parentheses:

  -3(k -8) -(k +5) = 23

  -3k -3(-8) -k -(+5) = 23

  -3k +24 -k -5 = 23 . . . . simplify

  -4k +19 = 23 . . . . . . . . . collect terms

  -4k = 4 . . . . . . . . . . . . . subtract 19 from both sides

  k = -1 . . . . . . . . . . . . . . . divide both sides by -4

_____

The rule for manipulating equations is, "any operation performed on one side of the equation must also be performed on the other side." Operations include addition, subtraction, multiplication, division, application of a function. Using the distributive property and collecting terms are ways to simplify equations that don't affect the truth of the equal sign (if those are done correctly).

In general, you make use of inverse operations to undo the operations you don't want. The goal is to get the variable by itself on one side of the equal sign.

The function for the points are  y = -15x - 5

From the information given, we have that;

The points are;

(1/3,0) (-2 3/4,0) and (0,-5)

Using the point-slope form of a linear equation, we have;

y - y₁ = m(x - x₁)

Such that;

Using (1/3, 0) and (0, -5), we have that the slope is;

m = (0 - (-5))/0 -1/3)

expand the bracket

= 5 / (-1/3)

= -15

Now, take any of the given points and substitute the values

Using (1/3, 0), we get;

y - 0 = -15(x - 1/3).

y = -15x - 5.

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The function for the points solved by  (1/3,0) (-2 3/4,0) and (0,-5) solved by point slope form is \(a=-15b-5\)

We have given the points:

(1/3,0) (-2 3/4,0) and (0,-5)

Using the formula of linear equation

\(a-\)\(a_{1}\)\(=x[b-b_{1}]\)                                                          

Where we will consider (1/3,0) = \(a-a_{1}\) and (0,-5) = \(b-b_{1}\)

that is 1/3 = \(a\), 0 = \(a_{1}\) and

0 = \(b\), -5 = \(b_{1}\)

\(x\) refers to the slope of line (take any variable)

Now for finding the value of \(x\),

\(x=a-a_{1}/b-b_{1}\)

inserting the values,

\(x=[0-[-5]]/[0-1/3]\\x= -15\)

Substitute the value of \(x\) in the equation

\(a-0=-15[b-1/3]\)

By simplifying the equation, we get

\(a=-15b-5\)

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Answer:

$32.25

Step-by-step explanation:

3 × $8.50 = $25.50, 5 × $1.25 = $6.25 × sales tax (8%) = $0.50, $6.25 + $25.50 + $0.50 = $32.25

Answer:

34.29

Step-by-step explanation:

I DID THIS IN CLASS!! trust me <3

Answer:

range=5

mode=6

Step-by-step explanation:

range means the max - min

6-1 = 5

mode means the most frequent number

6

Answer:

Range: 5 Mode: 6

Step-by-step explanation:

Answer:

12) v=0

13) w=9

14) y=5

15) z=-8

16) n=2, m=-2

17) x=3

18) 1, because \(2^{4}/{2^{4} =1\). Therefore \(2^{4}/{2^{4} = 2^{4-4}=2^{0}=1\)

Step-by-step explanation:

12) Exponent Zero rule. Anything raise to 0 power equals 1.

13) Exponent Negative rule: \(b^{-n} =\frac{1}{b^n}\)

14) Exponent Quotient rule: \((a^n/a^m)=a^{n-m}\)

In this case, \((3^3/3^5)=3^{3-5}=3^{-2}=1/3^2=1/9\)

15) Exponent Product rule: \((a^n*a^m)=a^{n+m}\)

In this case, \((5^8*5^{-8})=5^{8-8}=5^0=1\)

16) Same rule as #15, \((7^2*7^{-2})=7^{2-2}=7^0=1\)

17)We can work backwards here, we know \(2^{2} = 4\) and \(3^{1} =3\), so we need \(2^2/3^1=4/3\).

To achieve this, use Exponent Quotient rule, what x-4=1? x=5.

Similar base: \((3^5/3^4)=3^{5-4}=3^{1}=1/3\). Put \(2^{2}\) back for \(\frac{4}{3}\)

18) 1*1*1*1=1. Anything raise to 0 power equals 1 (Exponent Zero rule). To prove this, any number(except 0) divided by itself equals 1.

Ex: 1/1=1, 4/4=1, \(2^4/2^4=1\).

We can prove this with the Exponent Quotient rule. \(1=\frac{3}{3} =\frac{3^1}{3^1}=3^{1-1}=3^0=1\). No matter how I write it, it's equal to 1.

The one exception is \(0^{0}\), which is undefined, since dividing by zero is illegal.

Hope this helps. ;)

Answer:

12) v=0

13) w=9

14) y=5

15) z=-8

16) n=2, m=-2

17) x=3

18) 1, because . Therefore

Step-by-step explanation:

12) Exponent Zero rule. Anything raise to 0 power equals 1.

13) Exponent Negative rule:

14) Exponent Quotient rule:

In this case,

15) Exponent Product rule:

In this case,

16) Same rule as #15,

17)We can work backwards here, we know  and , so we need .

To achieve this, use Exponent Quotient rule, what x-4=1? x=5.

Similar base: . Put  back for

18) 1*1*1*1=1. Anything raise to 0 power equals 1 (Exponent Zero rule). To prove this, any number(except 0) divided by itself equals 1.

Ex: 1/1=1, 4/4=1, .

We can prove this with the Exponent Quotient rule. . No matter how I write it, it's equal to 1.

Answer: A

Step-by-step explanation: You are saying that when he bought all of these things he spent $30. So all of your items have to add up to 30.  Answer A is saying Ticket+Nachos+Soda=total.

Answer:

A.$0.45

B.$3.51

Answer:

Step-by-step explanation:

A. They will charge forty-five cents per ounce.

B. They will charge  Reid  $3.51 for her bowl.