Mathematics High School

help pls am confused ​

Help Pls Am Confused

Answers

Answer 1

Answer:

Given, x−x1=5

Squaring both the sides,

⇒(x−x1)2=52

⇒x2+x21−2(x)(x1)=25

⇒x2+x21=25+2

⇒x2+x21=27

Now,

x3−x31

=(x−x1)[(x)2+(x1)2+(x)(x1)]

=5(27+1)

=140

Answer 2

9514 1404 393

Answer:

  322

Step-by-step explanation:

Consider the cube ...

  (a +b)³ = a³ +3a²b +3ab² +b³

  = a³ +b³ +3ab(a+b)

Now, for a=x and b=1/x, we have ...

  (x +1/x)³ = x³ +1/x³ +3(x)(1/x)(x +1/x)

Using the known value for x+1/x, this is ...

  7³ = x³ +1/x³ +3(7)

  x³ +1/x³ = 7³ -3·7 = 343 -21

  x³ +1/x³ = 322

_____

If you want to try this with numbers, the solutions to the original equation are ...

  x ≈ 6.85410196625 and its reciprocal.

Related Questions

10 times the sum of half a number x and 4 is 6

Answers

Answer:

-10.4

Step-by-step explanation:

Assume that the number we are looking for is x.

Now, we want to get 10 times the sum of half the number and 6 and equate this expression to 8. Then we can solve for x

step by step

half the number is 0.5x

the sum of half the number and 6 is 0.5x + 6

10 times the sum of half the number and 6 is 10(0.5x +6)

10 times the sum of half the number and 6 equals 8 is 10(0.5x+6) = 8

Now solve for x

10(0.5x + 6) = 8

5x + 60 = 8

5x = 8 - 60

5x = -52

x = -52/5

x = -10.4

Help please in the photo

Answers

Answer:

m = 40

Step-by-step explanation:

The triangle inside the circle has 2 equal sides ( the radii ) of the circle, thus

The base angles are congruent both 50°

The 3 angles on the tangent sum to 180°, so

m + 50 + 90 = 180

m + 140 = 180 ( subtract 140 from both sides )

m = 40

Robbie needs to figure out how much money he is going to spend on burgers. He needs 22 in total and it costs $3.99 for 4.

Answers

Answer:21.94

Step-by-step explanation:22 divided by 4 = 5.5 5.5 times 3.99$ equals 21.94

Pls someone help hurry

Answers

Answer:

First base goes with first height, second base with third height and third base with second height

Step-by-step explanation:

Find the value of x in the triangle shown below.

Answers

I think it’s 70 because it is an acute triangle

Answer:

55

Step-by-step explanation:

I believe it's 55 because the triangle has to equal 180

so I subtracted 70 from 180 and x can't be 70 because they don't have the same lengths

subtracting  70 from 180 gave me 110 then I divided by 2 since both the top angle and x would have the same angle in degrees xD

7 Chris needs to cut a roll of twine into 16 equal lengths for a
project. If the roll of twine measures 900 inches, how long
will each length of twine measure?

Answers

Answer:

I am pretty sure it is 56 because all you have to do is dvided and it comes out to 56.25 but you cant have .25 because that is not an equal peice so yeah I think it is 56

Answer:56.25

Step-by-step explanation:I had same problem it was correct

48/1000 decimal form

Answers

Answer:

0.048

Step-by-step explanation:

I've used a calculator, then rounded it for you.

Let me know if you need any more help. :)

. You want to buy some underwear. A
package of 8 costs $3.12. A package of 15
costs $6.15. A package of 20 costs $7.60.
Which package is the best buy?

Answers

Answer:

the second

Step-by-step explanation:

Gabriella bought 6 7/14 yards
of red fabric and 7 1/7 of
blue. How much cloth did she
buy in all?

Answers

Answer:

13 9/14

Step-by-step explanation:

Add the blue + red fabric

1. Make the denominator the same

6 7/14 + 7 2/14

2. Add

6 7/14 + 7 2/14 = 13 9/14

Answer:

13 9/14

Step-by-step explanation: You would change 1/7 into 2/14 for a common denominator then add 2/14 and 7/14 and get 9/14 and 6+7=13 so it would be 13 9/14. Plzzzz give me brainliest

52$ tie; 50% discount

Answers

Answer:

$26

Step-by-step explanation:

its 50% , just divide by 2

Answer:

52/2 = $26

Step-by-step explanation:

50% is half, so simply divide it by 2

MATH QUESTION PLS HELP!

Answers

Answer:

4) -14/5

Step-by-step explanation:

Answer is 4 -14/5 !!

Kayla paid $27.50 for a pair of gloves. The cost of the gloves is $8.75 more than the cost of a scarf. Which equation can be used to find the cost of the scarf?

Answers

Answer:

You can use subtraction

Step-by-step explanation:

$27.50 - $8.75 = $18.75 (cost of scarf)

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

the gloves cost 27.50 dollars and if the scarf cost 8.75 dollrs more then that means that if we subtract that extra mount we should get the price of the scarf

if $18.75 is the cost of scarf and if gloves are $8.75 more then...

$18.75 (scarf) + $8.75 (extra $) = $27.50 (gloves)

Why is the answer 3? Please explain.

Answers

Answer:

c

Step-by-step explanation:

you have to plug it in and trying slove for f(x) and basically it is straight forward.

Caffenine takes a certain amount of time to leave your system if you drink 3 cups of coffe in the morning the function that represents the amount of caffeine remaining in your body after drinking the coffe is given by g(t)=130(.8346)^t where t is the timein hours. how much caffeine remains in your body after 1 day. how much caffeine remains in your body after 2 days

Answers

Answer:

In 1 day, 1.70

In two days 0.022

Note; Unit was not given in the question, I would have included it

Step-by-step explanation:

Here, we are to calculate the amount of caffeine remaining in the body.

To calculate this, we simply substitute for the number of hours t in the equation.

In one day , we have 24 hours

So our substitution will be t = 24

Hence; for a day;

g(24) = 130(0.8346)^24 = 1.70

For two days, we have t = 48 hours

Thus; g(48) = 130(0.8346)^48 = 0.022

You just bought a car and need to expand your driveway by pouring more concrete. If the dimensions of the addition are 11ft by 6.5ft how many square feet of concrete do you need to pour?

Answers

(In case it is a rectangle)

Area of rectangle=length multiplied by breadth

=11 multiplied by 6.5= 71.5ft^2

Kenny had a total of 140 minutes to read, do homework, and play video games. he spent x minutes reading. he spent 2(x + 5) minutes doing homework and he spent 25 minutes playing video games. How many minutes did Kenny spent reading?

Answers

Answer:

35 min

Step-by-step explanation:

given that the total time spent is 140min

and that the time spent reading is x minutes

and also that the time spent doing home work is 2(x+5)

the time spent playing video game is 25

the expression for the total time is given as

total = reading +homework +video game

140=x+2(x+5)+25

solving for x we have

140=x+2x+10+25

140=3x+35

140-35=3x

105=3x

x=105/3

x=35

kenny spent 35 min reading

Time spend for reading is 35 minutes

Given that;

Total number of minutes Kenny have = 140 minutes

Time spend for reading = x

Time spend for homework = 2(x + 5) = 2x + 10

Time spend for games = 25 minutes

Find:

Time spend for reading

Computation:

Total number of minutes Kenny have = Time spend for reading + Time spend for homework + Time spend for games

140 = x + 2x + 10 + 25

3x + 35 = 140

3x = 105

x = 105 / 3

x = 35

So,

Time spend for reading = 35 minutes

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easy questions pls help (question in picture)

Answers

Answer:

1. P= 80

60/.75=80

2. x= 5/3

-27/25x / -27/25= -9/5 / -27/25

-9/5 / -27/25 --- -9/5 x -25/27

3. -300

-2.7/-2.7 = 810/-2.7

4. 120

84x100/70

84/x = 70/100

1. p=80

=(60×4)÷3

=240÷3

=80

2.x=1.6667

={-9/5}×{-25/27}

=1.6667

3.t=-300

=(810÷-2.7)

=(810×10)÷(-2.7×10)

=(8100÷(-27)

=300

Quadrilateral WXYZ is a square. If WT=6, find each measure?

Answers

We know that the diagonals of a square bisect each other which results in the formation of 4 - 90° angles . Which means ZX = 2 × WT . Then ,

= ZX = 2 × 6

= ZX = 12 ( ZX is a diagonal )

Side XY =

XY = √2 d/2

XY = √2 . 12/2

XY = 8.48528

m∠WTZ = 90° ( as the diagonals of a square intersect to form a complete angle ( 360° ) which is divided into four equal parts , each part being 90° )

m∠WTZ = 90°

m∠WYX = 45° ( WYX is half of one of the interior angles in this square which will mean it will be equal to 45° )

Therefore , m∠WYX = 45°

In short :

ZX = 12

XY = 8.48528

m∠WTZ = 90°

m∠WYX = 45°

Solve the equation, justify
each step with an algebraic
property.
7 = 16 + 3x

Answers

7= 16 + 3x
7-16 = 3x
-9 = 3x
x = (-9)/(3)
x = -3

Using the graph, determine the coordinate of the y-intercept of the parabola.

Answers

Answer:

(0,8)

Step-by-step explanation:

The parabola intercepts at 8 on the y axis, and since the interception has zero x value, x=0.

The graph the coordinate of the y-intercept of the parabola is (0, 8).

What is Intercept?

The points where a line crosses an axis are known as the x-intercept and the y-intercept, respectively.

When you know the slope of the line to be investigated and the given point is also the y intercept, you can utilise the slope intercept formula, y = mx + b. (0, b). The y value of the y intercept point is denoted by the symbol b in the formula.

Given:

From the parabolic graph we can see that the intersecting point (0, 8)

Now, the y- intercept is the point in the vertical axis.

As, from the graph the coordinate of the y-intercept of the parabola is (0, 8)

Learn more about intercept here:

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Jack plans to buy 2.25 lb of coleslaw at $2.80 per pound. He also wants 2lb of macaroni salad that sells for $3.15 per pound. Jack has a $10 bill in his wallet. Is this enough for the coleslaw and the macaroni? Explain.

Answers

No

2.25 times 2.80 gives the cost for the total coleslaw, which is $6.30
2 times 3.15 gives the cost for the total macaroni salad, which is also $6.30
Add those together and you get $12.60, which is larger than $10, so it is not enough
First, multiply 2.25 by 2.80 to get the cost of the coleslaw, which happens to be $6.30. Then, multiply 3.15 times 2, which would also get $6.30. Last, add $6.30 + $6.30, to get $12.60, which is more than $10, so he doesn’t have enough.

determine which is less expensive per can a 6 pack of soda for 2.20 or a 12 pack of soda for 4.25 explain​

Answers

Answer:

the 12 pack would be cheaper

Step-by-step explanation:

first you would find the price of one can   (2.20/6)=.37 and (4.25/12)=0.354

the cheapest would be the 12 pack

4/5 x 2/7 because my teacher is saying its not this sooooo

Answers

Answer:

8/35

Step-by-step explanation:

4/5x2/7

4x2=8

5x7=35

Hope this helps. Plz give brainliest.

Answer:

8/35 Good luck sis ;)

Step-by-step explanation:

There are 19.3 cups of flour in a bag. The chef uses 2.9 cups for making cookies. Then, he uses 1.2 cups of sugar and 5.1 cups of flour for making banana bread. How many cups of flour are left?

Answers

Answer:

10.1

Step-by-step explanation:

19.3-2.9=16.4

16.4-1.2=15.2

15.2-5.1=10.1

so there are 10.1 cups of flower left

Answer:11.3

Step-by-step explanation:

19.3 - 2.9 -5.1= 11.3

You don't subtract the 1.2 cups of sugar because it's only asking about the flour.

Each​ month, your phone company charges you a fee of 15 cents per minute as well as a service fee of ​$6.95 . Write a linear function rule that models the number of dollars y you pay each month for any number of minutes x.

Answers

Answer:

y=$9x+$6.95

Step-by-step explanation:

Answer:

$7.10

Step-by-step explanation:

6.95+.15=7.10

A surveyor is surveying a street. The surveyor is standing at point B looking down the street at a No Parking sign at point C and a Stop sign at point A. Given BC = 4x-5 meters, BA = 20 meters, CA = 6 meters, and point C is between B and A, what is x in meters?

Answers

Answer:

i think x is bc=4x-5 meters

Step-by-step explanation:

Solve for y: 3x +y = 12
PLEASE SHOW STEPS.
Brainliest

Answers

Answer:

y=6

Step-by-step explanation:

you can do 3x2 to get 6. 12-6=6  so y can equal 6

explain how to solve it?
6 = 3 x - 9

Answers

Answer:

5

Step-by-step explanation:

Step 1:

6 = 3x - 9       Equation

Step 2:

15 = 3x      Add 9 on both sides

Step 3:

x = 15 ÷ 3      Divide

Answer:

x = 5

Hope This Helps :)

Answer: 5

Step-by-step explanation:

6 = 3x - 9

+9      + 9

15 =  3x

/3     /3

5 = x

? what is the ans of the question​

Answers

Answer:

a. 12x+22, b. x = 9

Step-by-step explanation:

a. The perimiter in terms of x is 2((4x+8)+(2x+3)) = 12x+22

b. 12x+22=136, 12x=108, x=9

a. 12x+22, b. x = 9

Step-by-step explanation:

a. The perimiter in terms of x is 2((4x+8)+(2x+3)) = 12x+22

b. 12x+22=136, 12x=108, x=9

help Anita is making headbands for her softball team. She needs a total of 34 yard of fabric. Which types of fabric cost less than $8 per yard? Write yes or no in each blank.


cotton 5.54
flannel 2.62
fleece 4.27
terry cloth 6.52

Answers

Cotton=No
Flannel=Yes
Fleece=No
Terry cloth=No

cost less than $8 per yard cotton, flannel and fleece.

What is Unitary Method?

It is a method where we find the value of a single unit from the value of multiple units and the value of multiple units from the value of a single unit.

First, let us make a note of the information we have. There are 5 ice-creams. 5 ice-creams cost $125.

Step 1: Let’s find the cost of 1 ice cream. In order to do that, divide the total cost of ice-creams by the total number of ice-creams. The cost of 1 ice-cream = Total cost of ice-creams/Total number of ice-creams = 125/5 = 25. Therefore, the cost of 1 ice cream is $25.

Step 2: To find the cost of 3 ice-creams, multiply the cost of 1 ice cream by the number of ice-creams. The cost of 3 ice-creams is cost of 1 ice-cream × number of ice-creams = 25 × 3 = $75. Finally, we have the cost of 3 ice-creams i.e. $75.

Given:

For cotton:

5.54 ÷ 3/4

=7.39<8

For flannel:

2.62 ÷ 3/4

=3.49<8

For fleece:

4.27 ÷ 3/4

=5.69 < 8

For terry cloth:

=6.52 ÷ 3/4

= 8.69>8

So, cost less than $8 per yard cotton, flannel and fleece.

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