can you help me please 3-4 please hurry

Answer:

75

Step-by-step explanation:

You will set the equation up as part/whole = percent/100 and when you replace it with your numbers you get 60/x = 80/100 now you cross multiply and do 60*100 = 80 * x and you get 6,000 = 80x now you divide both sides by 80 then you get 75 was the original price

Answer:

39

Step-by-step explanation:

sum of interior angles of a triangle is 180

180-(102+39)=x

180-141=x

39=x

Answer:

39

Step-by-step explanation:

it should all add up to 180

102 + 39 = 141

180 - 141 = 39

The minimum average score Ethan can earn on his fifth and final test is option (D) 60% is the correct answer.

An average of a list of data is the expression of the central value(mean) of a set of data. Average is calculated by adding quantities together and dividing the total by the number of quantities.

For the given situation,

The scores for 4 exams are 68%,72%, 85%, and 90%.

Let the score for the fifth test be x.

Formula for the average,

[tex]A = \frac{Sum of individual scores}{Total number of tests}[/tex]

⇒ [tex]75=\frac{68+72+85+90+x}{5}[/tex]

⇒ [tex]375=315+x[/tex]

⇒ [tex]x=60[/tex]

Hence we can conclude that the minimum average score Ethan can earn on his fifth and final test is option (D) 60% is the correct answer.

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Answer:

Step-by-step explanation:

Part A

A square pyramid surface area can be calculated using A = Lw (which gives you surface area of the base square) & 4 of A = bh/2 (which gives you surface area of the 4 triangles on the side)

This means overall A = Lw + 4(bh/2)

Length = L = 4"

Width = w = 4"

Base = b = w = L = 4"

Height = h = 6"

A = Lw + 4(bh/2)

A = Lw + 2bh     This is the answer after simplifying

A = (4")(4") + 2(4")(6")      This is the numerical expression.

A = 16" + 48" = 64"    This is the numerical answer.

A square prism surface area can be found using 2 of A = Lw (which represents the surface area of the 2 squares) and 4 of A = Lh (which gives you the surface area of the 4 rectangles).

This means overall A = 2Lw + 4Lh

Length = L = 4"

Width = w = 4"

Height = h = 6"

A = 2Lw + 4Lh

A = 2(4")(4") + 4(4")(6")    This is the numerical expression.

A = 128"     This is the numerical answer.

Part B

To see the difference between the 2 polyhedrons, I will place them as follows.

Pyramid Area = A = (4")(4") + 2(4")(6")

Prism Area = A = 2(4")(4") + 4(4")(6")

The numerical expression shows that the surface area of the prism has one more square area (as represented by 4"x4"), and has 2 more rectangular area (as represented by 4"x6").

The difference of the 2 numerical expressions can be found using subtraction:

A = [2(4")(4") + 4(4")(6")] - [(4")(4") + 2(4")(6")]

A = (4")(4") + 2(4")(6")

Hope this helps.

Answer:

angle ADB = 41 degrees

angle ABD = 90 degrees

angle AFE = 70 degrees

angle ACE = 31 degrees

Step-by-step explanation:

angle ADB = 41 degrees because minor arc AB = 82 degrees and it's inscribed angle is 1/2 of it's arc.

angle ABD = 90 degrees because arc AED = 180 degrees and inscribed angles are equal to 1/2 of the arc.

arc ABD = 180

arc ABE = arc ABD + 70 degrees = 250 degrees

minor arc AE = 360 degrees-250 degrees = 110 degrees

angle AFE = 1/2 (250-110) = 70 degrees

angle ACE = 1/2(110-48) = 31 degrees

Answer:

C

Step-by-step explanation:

You do $8.50 Times 3 to get $25.50

Answer:

x = 0.75

Step-by-step explanation:

Simplifying

(7x + -5) + -1(3x + -2) = 0

Reorder the terms:

(-5 + 7x) + -1(3x + -2) = 0

Remove parenthesis around (-5 + 7x)

-5 + 7x + -1(3x + -2) = 0

Reorder the terms:

-5 + 7x + -1(-2 + 3x) = 0

-5 + 7x + (-2 * -1 + 3x * -1) = 0

-5 + 7x + (2 + -3x) = 0

Reorder the terms:

-5 + 2 + 7x + -3x = 0

Combine like terms: -5 + 2 = -3

-3 + 7x + -3x = 0

Combine like terms: 7x + -3x = 4x

-3 + 4x = 0

Solving

-3 + 4x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3' to each side of the equation.

-3 + 3 + 4x = 0 + 3

Combine like terms: -3 + 3 = 0

0 + 4x = 0 + 3

4x = 0 + 3

Combine like terms: 0 + 3 = 3

4x = 3

Divide each side by '4'.

x = 0.75

Simplifying

x = 0.75

Answer:

When solving equations like this, you have to use a method called PEMDAS.

This stands for:

(7x + 5) - (3x +2)

Let's work it out...

Step one) Distribute the equation

Distributing the equation helps simplify it and make solving much easier.

(7x−5) − 1(3x−2)

(7x−5) − 3x + 2

Step two) Eliminate the Parenthesis

Now that the equation is simplified, you can take out the Parenthesis.

(7x − 5) − 3x + 2

7x − 5 − 3x + 2

Step three: Add the numbers

Add the two whole numbers together (-5 + 2)

7x − 5 − 3x + 2

7x − 3 − 3x

Step four: Combine like terms

Combine like terms or the numbers with variables (7x - 3x)

7x − 3 − 3x

4x − 3

Solution

Hope this helped! :)

Answer:

Step-by-step explanation:3

Answer: 3(n + 5) ≥ 17

HOPE THIS HELPS

Answer:

Step-by-step explanation:

13x + 47 = 151

subtract 47 from both sides

13x = 104

divide by 13 on both sides

x = 8

Answer:

the answer is 2 or 2/1 hope this helps

Answer:

In fraction form, the slope is 2/1.

Or, the slope is just 2.

Step-by-step explanation:

Using the equation:

m =  

y2 - y1  /

x2 - x1

Plug in the x and y points and solve.

note: m = slope in slope intercept form, y - mx + b

y2 = 14     y1 = 18

x2 = -16     x1 = -14

14 - 18 / -16 -(-14)

-4 / -2

Simplified: -2 / -1

In fraction form, the slope is -2 / -1, or 2/1 because either way works.

Or, the slope is just 2.

Hope this helps! If you have any additional questions, please don't hesitate to ask me or your teacher to be sure you master the subject. Stay safe, and please mark brainliest! :)

Answer:

B- 4x-9

Step-by-step explanation:

that's the answer

Answer:

The family traveled at 45 miles per hour.

Step-by-step explanation:

The option C. Driver's License is not necessary to book a flight.

Driver's License is an official document given to a person who is permitted to drive vehicle on the road.

This is usually given after certain tests including Physical driving and other general knowledge of driving.

Now, when we book a flight, credit card can be used to book a flight, but not necessary.

But there is a chance than you can use the credit card.

Arrival city is necessary when you book a flight because then only other procedures will follow.

Similarly, date of travel is also required in order to book the flight on a particular day.

So the least necessary document is Driver's License.

Hence Driver's License is not necessary to book a flight.

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Answer:

alternate exterior angles= 1,7 and 2,8 corresponding, interior 3,6 and 4,5

Answer:

8400

Step-by-step explanation:

10800/9= 1200

1200*7= 8400

Answer:

14x+6 and (7x+7)+(3+3)

Step-by-step explanation:

Answer:

8n+16.2=1.6

n=-1.825

Step-by-step explanation: Subtract 16.2 from both sides 8n+16.2-16.2=1.6-16.2

Simplify 8n=-14.6/8

n=-1.825

Answer:

-1.825

Step-by-step explanation:

8n  +  16.2  =  1.6

(step1)      

8n  +  16.2  =  1.6

        - 16.2     -16.2

8n      =      -14.6

(step2)

8n =  -14.6

----    ------

 8      8

(step3)

-1.825

1. subtract 16.2 from both sides, you have to get rid of the number that is being add/subtracted to get the n and result alone

2. divide by the number next to the variable since you have to get the variable alone in order to find out what it is. you divide because you have to do the opposite of what the variable IS doing.

3. get the result lol

Answer:

A would be equivalent

Step-by-step explanation:

if you think about it answers c and d would not make sense because they use 14 and not nine, so if you comapare the two you should get answer A

Answer:

y = 2x + 14

Step-by-step explanation:

Answer:

14-8=6/300=50 thats your answer

Answer:

Step-by-step explanation:

Answer:

[36^3] squared

Step-by-step explanation:

formula a x/n= n [a^x] squared

a x/n= n [36^3]

[36^3] squared

Answer:

I don't get it send a pic of the question Please I will see if I can help

Answer:

680kg

Step-by-step explanation:

The average weight of ten bulls is 500kg and the standard deviation of the weight is 30kg. What would be the weight of a bull that is 6 standard deviations above the mean weight

The formula to solve for the weight that is 6 standard deviation above the mean weight =

μ + 6σ = w

Where

μ = Mean weight = 500kg

σ = Standard deviation = 30kg

Hence:

w = 500kg + 6(30kg)

w = 500kg + 180kg

w = 680kg

Therefore, the weight of a bull that is 6 standard deviations above the mean weight is 680 kg

Using the normal distribution, it is found that the weight of a bull that is 6 standard deviations above the mean weight is of 680 kg.

In a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

In this problem, the mean and the standard deviation are, respectively, of [tex]\mu = 500[/tex] and of [tex]\sigma = 30[/tex].

The weight of a bull that is 6 standard deviations above the mean weight is X when Z = 6, hence:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]6 = \frac{X - 500}{30}[/tex]

[tex]X - 500 = 6 \times 30[/tex]

[tex]X = 680[/tex]

The weight of a bull that is 6 standard deviations above the mean weight is of 680 kg.

More can be learned about the normal distribution at https://brainly.com/question/24663213

Answer:

19.4

Step-by-step explanation: