Given $a \equiv 1 \pmod{7}$, $b \equiv 2 \pmod{7}$, and $c \equiv 6 \pmod{7}$, what is the remainder when $a^{81} b^{91} c^{27}$ is divided by 7?

Answers

Answer 1
[tex]\begin{cases}a\equiv1\pmod7\\b\equiv2\pmod7\\c\equiv6\pmod7\end{cases}[/tex]

[tex]a^{81}\equiv1^{81}\equiv1\pmod7[/tex]

[tex]b^{91}\equiv2^{91}\pmod7[/tex]

[tex]2^{91}\equiv(2^3)^{30}\times2^1\equiv8^{30}\times2\pmod7[/tex]
[tex]8\equiv1\pmod7[/tex]
[tex]2\equiv2\pmod7[/tex]
[tex]\implies2^{91}\equiv1^{30}\times2\equiv2\pmod7[/tex]

[tex]c^{27}\equiv6^{27}\pmod7[/tex]

[tex]6^{27}\equiv(-1)^{27}\equiv-1\equiv6\pmod7[/tex]

[tex]\implies a^{81}b^{91}c^{27}\equiv1\times2\times6\equiv12\equiv5\pmod7[/tex]
Answer 2

Answer:

5 (mod 7)

Step-by-step explanation:


Related Questions

in a right triangle the sum of the squares of the leg lengths is equal to the square of the hypotenuse length what does this describe ?

Answers

a^2 + b^2 = c^2...this is the pythagorean theorum...not exactly sure if I spelled that correctly...lol
The Pythagorean Theorem.  It is the relationship between the hypotenuse of a right triangle to its sides.

Helen has 48 cubic inches of clay to make a solid square right pyramid with a base edge measuring 6 inches. Which is the slant height of the pyramid if Helen uses all the clay? 3 inches 4 inches 5 inches 6 inches

Answers

Answer: 5 inches


Step-by-step explanation:

Given: Volume of clay = 48 cubic inches

If we make a solid square right pyramid with a base edge a= 6 inches.

Then its base area = [tex]a^2=6^2=36\ inches^2[/tex]

we know that volume of square right pyramid=[tex]\frac{1}{3}\times\ a^2h[/tex]

Therefore, volume of square right pyramid made by all of clay=[tex]\frac{1}{3}\times\ a^2h[/tex]=48 cubic inches

[tex]\Rightarrow\frac{1}{3}\times\ (36)\times\ h=48\\\Rightarrow12h=48\\\Rightarrow\ h=4\ inches.....\text{[Divide 12 on both sides]}[/tex]

Now, slant height [tex]l=\sqrt{(\frac{a}{2})^2+h^2}[/tex]

[tex]\\\Rightarrow\ l=\sqrt{3^2+4^2}\\\Rightarrow\ l=\sqrt{9+16}\\\rightarrow\ l=\sqrt{25}\\\Rightarrow\ l=5[/tex]

The slant height of the pyramid if Helen uses all the clay=5 inches

Answer:

The correct answer would be 5 inches.

Step-by-step explanation:

write an expression with an exponent that has a value between 0 and 1

Answers

     

Okay, so first, we find a number that is between 0 and 1.


A number that qualifies for that condition would be ½.

A property of exponents is x^(n/m) = √x m sqrt(x^n), so x^(1/2) = √x

Therefore, such expression is:

x^(1/2) = 4
Where you now solve for x.

 

Exponential notation is a common language that is needed in order to communicate mathematical ideas efficiently and clearly. Efficiently written repeated multiplication was the reason that this notation was developed.

An example of this is the division of cells that causes growth to occur in living organisms. A single type of cell is divided 2 times in an hour, therefore in 12 hours, the cell will divide into 2 • 2 • 2 • 2 • 2 • 2 • 2 • 2 • 2 • 2 • 2 • 2 time, or as efficiently written, 2^12.

six more than five times a number X is at least 21

Answers

6+5x≥21

5x≥15

x≥3

Final answer: x≥3

Given point A with coordinates (3, 5) and point B with coordinates (12, 9)… • Find point C that splits segment AB into a ratio of 4:7 • Find point D that is located 2/5 of the way from point A to point B

Answers

Refer to the diagram shown below.

Part 1
Let the distance AC = 4d and distance BC = 7d so that C splits Ab in a 4:7 ratio.
Then
(12 - x)/(x - 4) = 7/4
Cross multiply.
7x - 28 = 48 - 4x
11x = 76
x = 6.909
Similarly,
(9 - y)/(y - 5) = 7/4
7y - 35 = 36 - 4y
11y = 71
y = 6.454

Answer:
The coordinates of C are (6.909, 6.454).

Part 2
Let AD = 2d and BD = 5d so that D s located 2/5 from A to B.
Then
(x - 3)/(12 - x) = 2/3
Cross multiply.
3x - 9 = 24 - 2x
5x = 33
x =  6.6
Similarly,
(y - 5)/(9 - y) = 2/3
3y - 15 = 18 - 2y
5y = 33
y = 6.6

Answer:
The coordinates of D are (6.6, 6.6)

Which answer does NOT correctly describe the graph of y = 5x + 12?

The answer choices are 1. The Line Has A Constant Rate Of Change 2. The Graph Contains The Point (5, 12) 3. The Line Crosses The y-axis 12 Units Above The Origin 4. The Slope Of The Line Can be written as 5/1

Answers

Answer

2. The Graph Contains The Point (5, 12)

Explanation

Remember that in a linear function of the form [tex]y=mx+b[/tex], [tex]m[/tex] is the slope/rate of change of the line and [tex]b[/tex] is the y-intercept.

From our equation we can infer that [tex]b=12[/tex], so the y-intercept of our graph is 12 units above the origin on the point (0, 12). Therefore, choice 2 correctly describe the graph of y = 5x + 12

We can also infer that [tex]m=5[/tex], so the slope of our line is 5, which is constant, so our line has a constant rate of change. Also, since every integer can be written as a fraction with denominator 1, we can write our slope as [tex]m=\frac{5}{1}[/tex]. Therefore, choices 1 and 2 correctly describe the graph of y = 5x + 12.

Now, remember that any point on the plane has coordinates [tex](x,y)[/tex], so, to check if a point is on a line, we just need to replace the [tex]x[/tex] and [tex]y[/tex] values in the line equation and check if the equation holds. Our point is (5, 12), so x = 5 and y = 12. Lets replace the values in our line:

[tex]y=5x+12[/tex]

[tex]12=5(5)+12[/tex]

[tex]12=25+12[/tex]

[tex]12\neq 37[/tex]

Since the equation equation doesn't hold (12 is not equal 37), we can conclude that the graph doesn't contain the point (5, 12). Therefore, choice 2 does NOT correctly describe the graph y = 5x +12.


Answer:

The graph contains the point (5,12)

I got it right on t t m

The probability that you will get grounded if you have a bad grade is 85%. The probability that you will get grounded and have extra chores is 50%. What is the probability that you will have extra chores given that you are already grounded?

Answers

If you are grounded, there are two options - you are only grounded or you have extra chores too. Therefore, at that point, there is a 100% chance of you already being grounded - we need to figure what percentage of 100 the extra chores is. To find that, we can do 50/85= around 59% percent

A ZIP code contains 5 digits. How many different ZIP codes can be made with the digits 0 through 9 if no digit is used more than once?

Answers

that is 10 different numbers, hmm

10 choices for first digit
9 for 2nd (since you used one already)
8 for 3rd
7 for 4th
6 for 5th

so then there are 10*9*8*7*6 different zip codes or 30240 differnt possible zip codes

___ ___ ___ ___ ___

Each dash represents one of the 5 digits of the zip code.

For the first dash there are 10 options for digits. The next dash has 9 options and so on...
Multiply the number of options for each dash:

10*9*8*7*6 = 30240 zip codes

This can also be solved with a Permutation:

nPr
10P5
You could put that into your calculator, but I'll solve it for you.
n!/(n-r)!
10!/(10-5)!
(10*9*8*7*6*5!)/5!
The 5!'s cancel
10*9*8*7*6
=30240 zip codes

It's the same number.

A mobile phone carrier charges an extra fee if a customer uses more than 500 minutes each month. Tom has already used 230 minutes this month. Which inequality can be used to determine how many more minutes Tom can use this month without going over the 500-minute limit?

Answers

Answer:

230+m_<500  the line is meant to be under the sighn btw

Step-by-step explanation:i got it right on edge 2021

To determine how many more minutes Tom can use without exceeding his limit, we use the inequality X ≤ 270, which indicates that Tom can use up to 270 additional minutes.

To determine how many more minutes Tom can use this month without exceeding a 500-minute limit, given that he has already used 230 minutes. To solve this, we let X represent the additional minutes Tom can use. Since he has already used 230 minutes, we form the inequality 230 + X ≤ 500 to ensure that the total does not surpass the 500-minute limit. Simplifying this inequality, we subtract 230 from both sides to get X ≤ 270. Therefore, Tom can use up to 270 more minutes without incurring extra charges.

Kris forwards an e-mail to 5 people. each of those people forward that e-mail to 5 more people. if this happens two more times, which expression shows the total number of people who have received the e-mail, not including Kris?

A) 4 x 5
B) 1+5+5^2
C)5+5^2+5^3
D) 5+5^2+5^3+5^4

Answers

The answer is D. It can't be A, because that would be if 4 people forwarded it to 5 people each. It can't be B, because that would be Kris, the people she forwarded it to, and the people they forwarded it to, it can't be C, because that the people Kris forwarded it to, the people they forwarded it to, and the people they forwarded it to, it's missing the 4th round of people. So it must be D.
Final answer:

The total number of people who have received the e-mail, not including Kris, after it has been forwarded 2 more times is 5 + 5^2 + 5^3.

Explanation:

The expression that shows the total number of people who have received the e-mail, not including Kris, after it has been forwarded 2 more times is 5 + 5^2 + 5^3 (option C).

Kris forwards the e-mail to 5 people, so there are initially 5 recipients.Each of those 5 people forwards the e-mail to 5 more people, resulting in 5 x 5 = 25 additional recipients.After the second round of forwarding, each of the 25 people forwards the e-mail to 5 more people, resulting in 25 x 5 = 125 additional recipients.

To find the total number of people who have received the e-mail, you sum up the number of recipients at each stage: 5 + 25 + 125 = 155. Therefore, the expression 5 + 5^2 + 5^3 represents the total number of people who have received the e-mail, not including Kris.

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Help me pleas win really stuck!!!

Answers

Solve for the variable, v.
(v+9)/15=0
Multiply both sides by 15.
((v+9)/15)*15=(0)*15
v+9=0
Subtract both sides by 9.
(v+9)-9=(0)-9
v=-9

Hope this helps.
-Benjamin


mr lippman bought a dryer for 160 bucks and sold it for 240 bucks. if overhead expenses were 20% of the selling price, what was the rate of profit on the selling price?

Answers

First calculate the amount of overhead expenses. The selling price was $240. To find 20% of 240, multiply 240 by 0.20, which equals 48. From that, we found that the overhead expenses were $48. To find the rate of profit, take the selling price and subtract all expenses. We know that Mr Lippman's selling price was $240, he spent $160 to buy the dryer, and he had $48 worth of overhead expenses. 240 - 160 - 48 = 32. Therefore, the profit was $32. To find the rate of profit, divide the profit by the total expenses. 32 / (240 + 160) = 0.08. Therefore, the rate of profit was 8%.

PLEASE ANSWER FOR BRAINLIEST

Answers

Here's what I came up with

[tex] \frac{(x+5)^{2} }{625} + \frac{(y-7)^{2} }{49} [/tex]

[tex] \sqrt{x^{2} ; y^2[/tex]

Let, 
[tex]x =25 ; y = 7 [/tex]

[tex] \sqrt{25^2 = 625} ; \sqrt{7^2 = 49} [/tex]

Your answers might be: [tex] (-29,7) & (19,7) [/tex]
If there's more that you need for your answers...Let me know so I can keep trying to work out the answers

What is the difference between dividing 16 by 2 and finding the square root of 16 ?

Answers

the mathematical process and the order in which you solve each equation. also the methods you'd use to do so. 

Determine the zeros of f(x) = x3 + 7x2 + 10x − 6

Answers

Hey there!

In order to find the roots (aka zeroes) of a function, you will need to use some graphing software. Once you graph your given function, you will need to count how many times it intersects the x-axis and note where those intersections are. I attached a photo of what this function should look like graphed. 

If you use software, you can pinpoint the exact locations of each root in cases like these where the lines don't intersect perfectly. Your roots look to be at about:

[tex]x = -4.45, -3, 0.45[/tex]

This will be your answer. Hope this helped you out! :-)

What is the measure of angle 4?

Answers

Answer: C) 108 degrees

------------------------------------------------------

Explanation:

Angle 4 is an exterior angle which corresponds to the remote interior angles of 33 degrees and 75 degrees. Through the remote interior angle theorem, we can add the remote interior angles to get the exterior angle

So we simply add 33 and 75 to get 33+75 = 108

If you chose not to use this theorem, then you can find angle three by using the fact that all three angles of the triangle must add to 180 degrees. So,

33+75+(angle 3) = 180
108+(angle 3) = 180
108+(angle 3) - 108 = 180 - 108
angle 3 = 72 degrees

Then use the fact that angle 3 and angle 4 are supplementary

(angle 3) + (angle 4) = 180
72 + (angle 4) = 180
72 + (angle 4) - 72 = 180 - 72
angle 4 = 108 degrees

either way, we get the same answer
∠4 = 75° + 33° = 108°
( Exterior angles )

Answer is C.

what is he value of 7 in 506,087

Answers

the value of 7 is 7 because it is in the ones place
Salutations

What is a the value of 7 in 506,087?

The value of 7 in the number >>>> 506,087 is ones.

Hope I helped.

If 5 key chains cost $11.25 then 15 key chains cost $

Answers

c/15=11.25/5  multiply both sides by 15

c=$33.75
33.75..................................................................................

What is three ratios that are equivalent to 18:4

Answers

We can make ratios equivalent to 18:4 by dividing and multiplying on it.
1. (18:4)/2=9:2
2. (18:4)*2=36:8
3. (18:4)*3=54:12

You're welcome :).
18/4=9/2=4.5...=27/6=114/12

ANSWER IF UR SURE 11 Points
ANSWER 6 & 7

Answers

6) answer is B , random sampling produces a representative sample


7)  0.1 = 10% so the answer is A, he saves 10% of his income


Please help!!!
Which of the following best describes interval C on the graph shown?


Linear constant
Linear decreasing
Linear increasing
Nonlinear increasing

Answers

Interval C = Linear constant

why are people down voting the answer above me? Anyways, the answer is A. linear constant

This is because of the fact that a linear constant is a straight horizontal line that stays, as it says, constant, that is until you go to the next interval.

what is the y-intercept of y=4x?

Answers

The y-intercept of y=4x is 0 since if you plug in 0 for x you get 0

A rectangular vegetable garden will have a width that is 3 feet less than the length, and an area of 54 square feet. If x represents the length, then the length can be found by solving the equation: x(x−3)=54x(x-3)=54 What is the length, x, of the garden?

I can't remember the steps to solving this.

Answers

x(x−3)=54
x^2 - 3x - 54 = 0
(x - 9)(x +6) = 0
x - 9 = 0 so x= 9
x + 6 = 0 so x = -6

x = 9 (length)
so width = x - 3 = 9 -3 = 6

answer
length = 9

double check
Area = LxW = 9x6 = 54





Peter went to his local zoo where 50% of its exhibits featured lions. If the zoo features 24 exhibits in total, then how many of the zoos exhibits featured lions?

Answers

12 exhibits featured lions since half of 24 is 12.
50%=0.5
24*0.5=12 or 1/2 of 24 is 12

12 exhibits feature lions

Number four please and please explain how to find perimeter only using vertices

Answers

perimeter= 34 units 

you could use a graphing calculator  (physical or online, i use desmos) or just graph it or use the distance formula between all the points (which would take a long time) and if you did decide to do that remember to use logic because finding the distance between the two opposite diagonal points is not part of the perimeter or finally you could count between the points, but like the distance formula only between the points that are going to be a part of the perimeter.

Which statement is true about the line segments below

Answers

The answer is C.
It cannot form a triangle because the length of the two shortest sides is less than that of the longest side.

This means that even if the lengths of the shortest legs lay parallel to the base line, the lines can never meet to form a closed figure because they are too short.

Given quadrilateral ABCD with sides, 3, 3, 5, 5 respectively, identify the type of quadrilateral

Answers

From the information we have, we can conclude that this quadrilateral is a rectangle. The reason behind this is because rectangles have two sets of parallel sides, which makes them different from squares. 

-TetraFish
Rectangle 3 breadth and 5 length

Compare and contrast the absolute value of a real number to that of a complex number

Answers

The absolute value of a real number is a positive value of the number. Which means that the absolute value is the distance from zero of the number line. However, that of the complex numbers is the distance from the origin to the point in a complex plane,

Consider a real number in two dimensional plane that X axis and Y axis having ordered pair : P(x,y) or (3,4).

To find it's absolute value we will find it's Distance from origin.

As Coordinate of Origin = (0,0)

Absolute Value of OP = [tex]\left | OP \right |[/tex]

     =  [tex]\sqrt{(0-x)^2+(0-y)^2}=\sqrt {x^2+y^2}[/tex]

    If the point is Q(3,4)

[tex]\left | OQ \right |=\sqrt{3^2+4^2}=\sqrt{5^2}=5[/tex]

In case of a complex number :

Z = a + bi , we consider two axes Real Axis and Imaginary Axis.

We represent Z that is (a,b) in the same way that we represent point in two dimensional plane.

To find it's absolute value , we will find it's distance from origin.

[tex]\left | Z \right |= \sqrt{a^2+b^2}[/tex]

If [tex]Z_{1}[/tex] = 6 + 8 i

[tex]\left | Z_{1}\right |=\sqrt{6^2+8^2}=\sqrt{36+64}=\sqrt{100}=10[/tex]





A water cooler holds 1,284 ounces of water. How many more 6 ounce glasses than 12-ounce glasses can be filled from the cooler

Answers

Answer:
- The water cooler can hold 214 of the 6-oz glasses because 1284 / 6 = 214

- The water cooler can hold 107 of the 12-oz glasses because 1284 / 12 = 107

- Because it is asking how many more glasses, you would do 214 - 107 = 107.

- You could also say that the water cooler can hold twice as many 6-oz glasses than 12-oz glasses.

Hope that helps! :)
twice as much 6 oz cups!!!!!

Use the substitution method to solve the system of equations. Choose the correct ordered pair.

y = 3x - 4
x = 9

A. (9, 31)
B. (1, -1)
C. (0, -4)
D. (9, 23)

Answers

y = 3x - 4 
x = 9
then
y = 3x - 4 
y = 3(9) - 4 
y = 27 - 4
y = 23

solution (9, 23)


answer

D. (9, 23)

The required solution of the system is (x, y) = (9, 23). Option D is correct.

What is coordinate?

Coordinate, is represented as the values on the x-axis and y-axis of the graph. while the coordinate x is called abscissa and the coordinate of the y is called ordinate.

Here,
To solve the system of equations using the substitution method, we substitute x = 9 into the first equation:

y = 3(9) - 4

y = 27 - 4

y = 23

Therefore, the solution of the system is (x, y) = (9, 23).

So, the correct answer is option D, (9, 23).

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