Add, subtract, multiply, or divide the following fractions. Remember to find the LCD first.
1/5+1/7+3/21

Answers

Answer 1

lcd 210

1/5=42/210

1/7=30/310

3/21=30/210

42+30+30=102/210

reduced 51/105

Answer 2
Final answer:

The sum of the fractions 1/5, 1/7 and 3/21 is 17/35. This was achieved by finding the least common denominator (LCD), converting the fractions to have the LCD, adding them, and then simplifying the result.

Explanation:

To add or subtract fractions, it's essential to find the least common denominator (LCD). The LCD in this case would be the least common multiple (LCM) of 5, 7, and 21, which is 105. Once we have the LCD, we can rewrite the fractions as an equivalent fraction with the LCD as the denominator:

For 1/5, multiply both numerator and denominator by 21, so it becomes 21/105.For 1/7, multiply both numerator and denominator by 15, so it becomes 15/105.For 3/21, multiply both numerator and denominator by 5, so it becomes 15/105.

Now all the fractions have the same denominator, and we can combine the numerators: 21/105 + 15/105 + 15/105 = 51/105. However, this can be simplified to 17/35 by dividing both numerator and denominator by 3.

Learn more about Adding Fractions here:

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Related Questions

PLEASE HELP! SEE ATTACHMENT

Answers

Answer:

-24 - 4ε

Step-by-step explanation:

100000000000 = 10¹¹ [One hundred billion]

You multiply this by -5 to get -500000000000. Now, "⁻²" means you will be taking the Multiplicative Inverse of whatever this result is, and since it is a long answer, I decided to give it to you in Calculus [Calculator] Notation.

Answer:the answer is ten to the eleventh minus five and then minus itself twice times ten

Step-by-step explanation:

PLZ HELP ME RIGHT NOW!
Type the correct answer in each box.

Answers

Answer:

fragrance A $26

fragrance B $24

Fragrance A has the greater unit rate

Step-by-step explanation:

To find the price of fragrance A , take the price and divide by the number of bottle

$78/3 bottles = $26 per bottle

To find the price of fragrance A , we can look at the graph and find the price for 1 bottle on the x axis and go up until we hit the red line.  The value of y is 24 dollars

Bill will rent a car for the weekend. He can choose one of two plans. The first plan has no
initial fee but costs $0.70 per mile driven. The second plan has an initial fee of $50 and
costs an additional $0.50 per mile driven. How many miles would Bill need to drive for the
two plans to cost the same?
Clear
Undo Help​

Answers

Answer:

250 miles

Step-by-step explanation:

Let number of mile driven be x

plan 1: Cost = 0.7x

plan 2: Cost = 50 + 0.5x

for both plans to cost the same,

Plan 1 Cost = Plan 2 Cost

0.7x = 50 + 0.5x   (solve for x)

0.7x - 0.5x = 50

0.2x = 50

x = 250 miles

john played his xbox 180 times over a 12 week period. if john played the same number of times each week, how many times did john played in one week?​

Answers

180/12 = 15

Each week he played 15 times

Hope this helps!

Answer:

15

Explanation:

180 times / 12 weeks = 15 times in one week

You have a normal distribution of hours per week that music students practice. The mean of the values is 8 and the standard deviation of the values is 4. According to the normal distribution, half of the music students practice between 5.3 to 10.7 hours each week. What percentage of the students study less than 5.3 hours each week? 12.5% 20% 25% 50%

Answers

Answer:

25%

Step-by-step explanation:

Since Normal Distribution is symmetrical Distribution and 5.3 and 10.7 are both 2.7 below and 2.7 above the mean respectively.

So, % of students less than 5.3 hours per week is 25%

Which term describes a function in which the yvalues form a geometric
sequence?
O
A. Linear increase
O
B. Exponential growth
O
C. Linear function
O
D. Exponential function

Answers

I would go with choice C.

Answer:

C. Third option

Step-by-step explanation:

C is the correct answer, because linear function describes a function in which the y values form a geometric sequence.

Hope this helps!

What is the interquartile range of this day at set?

Answers

Answer: 49

Step-by-step explanation

Am god

Y=f(x)=1/16^x Find the f(x) when x=1/4 Express as a decimal rounding to the nearest thousandth

Answers

Answer:

0.500.

Step-by-step explanation:

f(x) = 1/16 ^ 1/4

Now 16 ^1/4 = ⁴√16

= 2

so f(x) = 1/2

= 0.500.

Find y: 5 + y = -15

Answers

Answer:

y = -20

Step-by-step explanation:

5 + y = -15

Subtract 5 from both sides to isolate y.

y = -15 - 5

y = -20

Hello!

Answer:

[tex]\boxed{y=-20}\checkmark[/tex]

The answer should have a negative sign.

Step-by-step explanation:

First, you switch sides.

[tex]y+5=-15[/tex]

Then, you subtract by 5 both sides.

[tex]y+5-5=-15-5[/tex]

Finally, you simplify.

[tex]-15-5=-20[/tex]

[tex]y=-20[/tex], which is our answer.

Hope this helps!

Thanks!

Have a nice day! :)

-Charlie

d/dx(1+x^4+x^6/x^2+x+1)
A)2x+1
B)2x-1
C)2
D)0

Answers

\frac{d}{dx}\left(\frac{1+x^4+x^6}{x^2+x+1}\right)=\frac{4x^7+5x^6+8x^5+3x^4+4x^3-2x-1}{\left(x^2+x+1\right)^2}

copy and paste that into a URL

Someone please help

Evaluate the formula
V= Bh/3 for B= 15in ^2
And
H=28in

Answers

Answer:

[tex]\large\boxed{V=140\ in^3}[/tex]

Step-by-step explanation:

[tex]V=\dfrac{Bh}{3}\to\text{it's a formula of a volume of a pyramid or a cone}\\\\B-base\ area\\h-height\\\\\text{We have}\ B=15\ in^2\ \text{and}\ h=28\ in.\\\\\text{Put the given values to the formula of a volume:}\\\\V=\dfrac{(15)(28)}{3}=(5)(28)=140\ in^3[/tex]

Which expression is equivalent to 12*12*12*12*12*12*12*12*12*12*12

Answers

Answer:

33?

Step-by-step explanation:

Answer:

Step-by-step explanation:


The surface area of a rectangular prism is increased by a factor of 16.

By what factor is the volume of the figure increased?

Answers

Answer:

The factor of the volume of the figure increased is 64

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its surface areas is equal to the scale factor squared and the ratio of its volumes is equal to the scale factor elevated to the cube

step 1

Find the scale factor

Let

z ----> the scale factor

z²=16

z=4 -----> scale factor

so

z³=4³=64

The factor of the volume of the figure increased is 64

Answer:

The volume of the rectangular prism will increase by a factor of 64.

Step-by-step explanation:

Surface area = [tex]length\times length[/tex]

or [tex]\sqrt{surface area} =length[/tex]

Therefore, the increase in the length of the sides will be = [tex]\sqrt{16}=4[/tex]

We know the volume is =[tex]length\times width\times height[/tex]

When there is increase in length of sides by 4 times, then volume will increase by [tex]4^{3}[/tex]

And [tex]4^{3}[/tex] = [tex]4\times4\times4=64[/tex]

Hence, the volume of the rectangular prism will increase by a factor of 64.

the price of one share of XYZ inc's stock drop by $0.02 on Monday. On Tuesday the price goes back up by $0.05.

Write an expression with three terms to show the change in price of XYZ stock.

_____________________________________________________________

If one share of XYZ stock cost $34.18 at the start of business on Monday morning, what is the price of the one share of XYZ stock at the close of business on Tuesday evening?

Answers

Answer:

1. $(x+0.03) - $x

2. $ 34.21

Step-by-step explanation:

Let the price of XYZ inc's share to be = $ x

On Monday, the price drops by $ 0.02 = $ x- $ 0.02 = $ (x-0.02)

New price of shares on Monday is = $ (x- 0.02)

On Tuesday the price goes up by $0.05 = $ (x-0.02) + $ 0.05 = $(x-0.02+0.05)

New price on Tuesday = $( x+ 0.03)..............................................(a)

Change in price of one share of XYZ's stock= Price on Tuesday - price of share

                                         = $(x+0.03) - $x..........................................(b)

2. Give that x= $34.18  solve equation (a) above

Price on Tuesday at close of business= $ (x+0.03)

                                                               = $ (34.18+0.03)

                                                                = $ 34.21

Basketball court has a perimeter of 278 feet the basketball court is 38 feet longer than it is wide find the length and the width of the garden justify your answer

Answers

ANSWER

[tex]w = 50.5[/tex]

[tex]l = 88.5[/tex]

EXPLANATION

The basketball court has a rectangular shape.

The perimeter of this court is calculated using the formula

[tex]P=2(l + w)[/tex]

It is given that,the court has a perimeter of 278ft. Let the width of the court be 'w' units, then the length is "w+38"

The perimeter then becomes:

[tex]2(w + 38+ w) = 278[/tex]

[tex]2w + 38= 139[/tex]

[tex]2w = 139 - 38[/tex]

[tex]2w = 101[/tex]

[tex]w = 50.5[/tex]

[tex]l = 50.5 + 38 = 88.5[/tex]

Check

[tex]P = 2(88.5 + 50.5)[/tex]

[tex]P = 2(139) = 278[/tex]

Who can help me?
please
Thank you​

Answers

The sum of the interior triangles in a triangle is 180, so if we add all the angle measures together, we should get 180. Therefore, we can make an equation like this,

[tex]110-2x+x+50+5x-40=180[/tex]

Simplify this.

[tex]4x+120=180[/tex]

[tex]4x=60[/tex]

[tex]x=15[/tex]

Now we can find each angle measure.

[tex]110-2x[/tex]

[tex]110-2(15)[/tex]

[tex]110-30[/tex]

[tex]80[/tex]

[tex]x+50[/tex]

[tex]15+50[/tex]

[tex]65[/tex]

[tex]5x-40[/tex]

[tex]5(15)-40[/tex]

[tex]75-40[/tex]

[tex]35[/tex]

So the angle labeled [tex]110-2x[/tex] is the largest angle in the triangle.

Answer:

x=15

biggest angle is 110-2x

Step-by-step explanation:

graph the linear equation. find three points that solve the equation, then plot on the graph. -x-3y=-6

Answers

Answer:

The equation can be written as

x+3y=6

To graph, you need to create a table for values of x with corresponding values of y that satisfy the equation

Sample points that solve the equation could be;

(-3,3),(3,1) and (-9,5)

From the graph attached, the three points are;

(-6,4)(0,2)(6,0)

What is the 47th term of the arithmetic sequence with this explicit formula?
an= -11 + (n - 1)(-3)

Answers

Answer:

-149

Step-by-step explanation:

Just plug in 47

-11+(47-1)(-3)

-11+46(-3)

-11+-138

- 149

Answer:

      = -149

Step-by-step explanation:

an= -11 + (n - 1)(-3)

The 47th term means n = 47

a47 = -11 + (47-1) (-3)

      = -11 + 46 (-3)

      = -11 -138

      = -149

What is the solution of 2x+4 = 16?

Answers

Answer:

x=6

Step-by-step explanation:

2x+4=16

-4       -4

2x+4-4=16-4

2x=12

/2   /2

2x/2=12/2

x=6

Answer:

x=6

Step-by-step explanation:

2x+4 = 16

Subtract 4 on each side

2x+4-4 = 16-4

2x = 12

Divide each side by 2

2x/2 = 12/2

x = 6

Use the figure and flowchart proof to answer the question.


Which Property of equality accurately completes Reason B?

A). Addition Property of Equality
B). Divison Property of Equality
C). Substitution Property of Equality
D). Subtraction Property of Equality​

Answers

Answer:

D Subtraction Property of Equality

Step-by-step explanation:

Whenever we subtract the same number of expression from both sides of the equation, the equality remains the same.

Reason A.  - Consecutive Interior Angles

Reason B.  - Substitution Property of Equality

Reason C.  - Subtraction Property of Equality

Final answer:

The Property of equality that accurately completes Reason B in the figure and flowchart proof is the Addition Property of Equality (A).

Explanation:

The property of equality that accurately completes Reason B in the figure and flowchart proof is the Addition Property of Equality (A).

The Addition Property of Equality states that if you add the same number to both sides of an equation, the equality is still preserved. In other words, if A + B = B + A, you can add the same number to both sides to obtain A + B + C = B + A + C, where C is any number.

In the given figure and flowchart proof, the equation A + B = B + A represents the Addition Property of Equality, and by applying this property, we can conclude that Reason B should be completed with the Addition Property of Equality (A).

The cross-sectional area parallel to the bases of the two figures above is the same at every level. Find the volume of the cone, to the nearest tenth.
A.
26.5 cm3
B.
44.2 cm3
C.
79.5 cm3
D.
132.5 cm3

Answers

Answer:

B.  44.2 cm3

Step-by-step explanation:

we know that

If the cross-sectional area parallel to the bases of the two figures above is the same at every level

then

the area of the base of the triangular pyramid is the same that the area of the base of the cone

step 1

Find the area of the base of the pyramid

[tex]A=(1/2)[6*4.8]=14.4\ cm^{2}[/tex]

step 2

Find the volume of the cone

The volume of the cone is equal to

[tex]V=\frac{1}{3}Bh[/tex]

we have

[tex]B=14.4\ cm^{2}[/tex]

[tex]h=9.2\ cm[/tex]

substitute

[tex]V=\frac{1}{3}(14.4)(9.2)[/tex]

[tex]V=44.2\ cm^{3}[/tex]

i got B but i’m not 100% sure

Use the diagram and given information to answer the questions and prove the statement.

Re-draw the diagram of the overlapping triangles so that the two triangles are separated.
What additional information would be necessary to prove that the two triangles, XBY and ZAY, are congruent? What congruency theorem would be applied?
Prove AZ ≅ BX using a flow chart proof.

Answers

Answer:

See explanation

Step-by-step explanation:

ASA Postulate (Angle-Side-Angle):

If two angles and the included side of one triangle are congruent to the corresponding parts of another triangle, then the triangles are congruent.

Consider triangles XYB and ZYA. In these triangles

∠X≅∠Z (given)XY≅ZY (given)∠Y is common angle

By ASA Postulate, triangles XYB and ZYA are congruent. Congruent triangles have congruent corresponding sides, so

BX≅AZ

[tex]\rm \overline{AZ} \cong \overline{BX}[/tex]

Please refer the below solution.

Step-by-step explanation:

Given :

[tex]\rm \angle X \cong \angle Z[/tex][tex]\rm \angle Y \;is\;common[/tex]

[tex]\rm \overline{XY} \cong \overline{ZY}[/tex]

Solution :

According to ASA (Angle Side Angle) postulate:

If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then both the triangles are congruent.

Now, consider triangle XBY and ZAY

[tex]\rm \angle X \cong \angle Z[/tex]

[tex]\rm \overline{XY} \cong \overline{ZY}[/tex]

[tex]\rm \angle Y \; is \; common[/tex]

According to ASA postulate triangle XBY and ZAY are congruent. And congruent triangles have congruent corresponding sides, therefore

[tex]\rm \overline{AZ} \cong \overline{BX}[/tex]

For more information, refer to the link given below

https://brainly.com/question/10629211?referrer=searchResults

Find the probability of selecting a class that runs between 51.25 and 51.75 minutes

Answers

Answer:

0.05

Step-by-step explanation:

This question is on probability

A uniform distribution means there is equal probability density for every number.

This  graph will be distributed to form a rectangle with area 1 unit square.

The base/range = 58-48 =10

Height of rectangle should be such that the area is 1 square unit. i.e 1/10 units

The probability will be found by calculating the area under the graph;

P( 51.25≤ x ≤ 51.75) , Area = (51.75-51.25)×1/10

0.5/10 =0.05

How is finding the fourth vertex of a parallelogram that is not a rectangle or a square the same as it is for a rectangle or square? How is it different?

Answers

well, the only difference from a parallelogram that is a square or a rectangle and one that isn't, is that the interior angles are 90° in the square and rectangle, however for other ones, like the one in the picture below, they are not 90°.

however, getting to any vertex, is just a matter of moving horizontally and vertically the same distances, as you see those arrows on the picture, since both pair of sides are parallel, one moves the same distance horizontall and vertically to get to the next vertex, so on that, is the same as for a square or rectangle as well.

is only different in that you're not moving alongside the segment, in a rectangle or a square, the lines are only vertical or horizontal, so you simply move straight to get the next vertex, on other parallelograms like the one below, you do move the same but is not alongside the segments.

If f(x) = 7 + 4x and g(x) = 2x, what is the value of 8 (5)?
A)11/2
B)27/10
C)160
D)270

Answers

I got D but i’m not 100% sure

If the functions f(x) = 7 + 4x and g(x) =1/2x then the value of  (f/g)(5) is 270, option D is correct.

What is a function?

A relation is a function if it has only One y-value for each x-value.

The given functions are f(x) = 7 + 4x and g(x) =1/2x

We have to find the value of (f/g)(5)

We know that from properties of functions

(f/g)(a)=f(a)/g(a)

So let us find f(5) and g(5)

f(5)=27

g(5)=1/10

(f/g)(5)=27/(1/10)

=27×10

=270

Hence, if the functions f(x) = 7 + 4x and g(x) =1/2x then the value of  (f/g)(5) is 270, option D is correct.

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m[tex]m^{2} -5m+mn-5n[/tex] equals what?

Answers

Equals (m-5)(m+n) by factoring

Which is an equivalent form of the compound inequality −44 > −2x − 8 ≥ −8?

Answers

Answer:

22 and 0

Step-by-step explanation:

−44 > −2x − 8 ≥ −8?

/-2    - 44  > -2x / .  -2      -8 ≥ -8

        = 22                              +8 =0

Answer:

An equivalent form of the compound inequality is the pair of single inequalities:

-2x - 8 < - 44, and −2x − 8 ≥ −8

Explanation:

You can split the compound inequality into two equivalent inequalities by taking each side from the variable.

The compound inequality −44 > −2x − 8 ≥ −8 means that two conditions must be satisfied:

    1. From the left side: - 44 > - 2x - 8

    2. From the right side: −2x − 8 ≥ −8

Then, as a first approach you can tell that an equivalent form of the compound inequality is the pair of single inequalities:

-44 > -2x - 8, and −2x − 8 ≥ −8

You should put the variable on the left sides, which will yield the best form of an equivalent pair of inequalitis.

- 2x - 8 < -44, and- 2x - 8 ≥ - 8

That is the best choice of an equivalent form, and from there you can solve the inequalities which will permit to obtain the solution. Of course, you can manipulate the variable and find many other equivalent forms.

Notice, that both inequalities must be satisfied simultaneously.

This is how you solve that system

- 2x - 8 < -44n

        Add 8 to both sides: - 2x < -36

         Divide both sides by - 2 (you have to change the sign): x > 18

- 2x - 8 ≥ - 8

-

        Add 8 to both sides: - 2x ≥ 0

        Divide by - 2 (again, you must change the sign): x ≤ 0

Then, the solution set is:

x > 18 and x ≤ 0 and that is an empty set, since x cannot be at the same time greater than 18 and less or equal to 0.

This is, you conclude that the compound inequality is false, because there is not a value of x which is a solution.

solve the equation for all real solutions 20p^2+33p+16=6​

Answers

First you must bring 6 to the other side of the equation so it equals zero. To do this subtract 6 to both sides

20p^2+33p+16 - 6=6​ - 6

20p^2+33p+10=0

Use the quadratic equation to solve this (image of the quadratic equation is below)

Remember that quadratic functions are set up like so:

[tex]ax^{2} +bx +c = 0[/tex]

That means that in this equation...

a = 20

b = 33

c = 10

^^^Plug these numbers into the quadratic equation and solve...

[tex]\frac{-33+/-\sqrt{(33)^{2}-4(20)(10)}}{2(20)}[/tex]

[tex]\frac{-33 +/-\sqrt{1089-800}}{40}[/tex]

[tex]\frac{-33+/-\sqrt{289} }{40}[/tex]

[tex]\frac{-33+/-17}{40}[/tex]

Keep in mind that +/- is ±

[tex]\frac{-33+17}{40}[/tex] ---> -2/5 ---> -0.4

[tex]\frac{-33-17}{40}[/tex] ---> -5/4 ---> - 1.25

Hope this helped!

~Just a girl in love with Shawn Mendes

Which of the following represents a region of a circle?
A. Sector
B. Arc
C. Tangent
D. Circumference

Answers

Answer:

A. Sector

Step-by-step explanation:

A Sector represents a region of a circle.

Answer:

The one that represents a region of a circle is A: Sector.

Step-by-step explanation:

It is a slice, a piece-slice part of a circle the area between two radiuses and the connecting arc of a circle. The segment of a circle is the region bounded by a chord and the arc subtended by the chord. It differs from the segment because the segment is the region bounded by a chord and the arc subtended by the chord.

Which is a reasonable first step that can be used to solve the equation

Answers

Answer:

Use distributive property:

2x + 12 = 3x - 12 + 5

Step-by-step explanation:

This can allow for combining like terms later on, and eventually isolating x as a variable.

For this case we have the following equation:

[tex]2 (x + 6) = 3 (x-4) +5[/tex]

The first step we must follow to solve the equation is to apply distributive property to the terms within the parenthesis:

[tex]a (b + c) = ab + ac[/tex]

Then, the equation is:

[tex]2x + 12 = 3x-12 + 5[/tex]

Answer:

The first step is to apply distributive property to the terms within parentheses.

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