Factorise fully 21a-7a²

Answers

Answer 1

-7(a-3)a

hope it helps...!!!!

Factorise Fully 21a-7a

Related Questions

Why is ten times ten?

Answers

Answer:

100

Step-by-step explanation:

10 · 10 = 100

Of course it all depends on what the symbols you’re using mean. Assuming the the * means “multiplied by,” the next question is “what is the meaning of the symbols 0 and 1,” but (conventionally) in any field, 0 denotes the additive identity and 1 the multiplicative identity. With those assumptions, the next question is “what is meant by the juxtaposition of those symbols?” Again, the commonly used convention is that, for any numeric field with base b, “10” would mean b, and 100 would be interpreted as b*b.

So, for example, if you’re working with a field where b*b = b (e.g., a modular arithmetic), then 10 and 10*10 would both be 1. On the other hand, if your field is, for example, the integers in base 10 (0, 1, …9), then the other answers would apply.

Bottom line: It all depends on what you assume. Without telling us that, it’s harder to answer your question. Note that the other replies to your question all make some (very commonly agreed upon) assumptions, e.g. that you were working in one of the commonly use, base 10, number fields (integers, real numbers, etc.) where ten sticks, each ten inches long, placed in a straight line, would form a line 100 inches long. (The modular field described above would break the sticks into one inch pieces, stack them on top of each other, and get a line one inch long.)

What is the axis of symmetry for the function f(x)=7−4x+x2?

Answers

Answer:

The axis of symmetry is x=2

Step-by-step explanation:

Pls write me fast what’s the answer 8(1 - 6p) - 2(6p + 7)

Answers

Answer:

-60p -6

Step-by-step explanation:

8(1 - 6p) - 2(6p + 7)

Distribute

8 - 48p  -12p -14

Combine like terms

-60p -6

Write the formula of the function f(x) whose graph is shown.

Answers

Answer:

[tex]f(x)=\dfrac{1}{x+4}[/tex]

Step-by-step explanation:

Asymptote: a line which the curve gets infinitely close to, but never touches.

From inspection of the graph, we can see that there is an asymptote at [tex]x=-4[/tex], since the curve gets infinitely close to this line, but never touches it.

Therefore, the function is undefined at [tex]x=-4[/tex]

For a rational function to be undefined, the denominator must equal zero at that point.  Therefore, we are looking for a rational function with a denominator that equals zero when [tex]x=-4[/tex].

Therefore, option D is the correct solution, since:

[tex]f(-4)=\dfrac{1}{-4+4}=\dfrac{1}{0} \implies \sf und efined[/tex]

I need help ASAP! I took a screenshot of the question and linked it.

Answers

Answer:

  18.  $5890

  19.  Mitsubishi Mirage

Step-by-step explanation:

The depreciated value can be found using an exponential relation. The decay rate here is given as 12.5%. The exponential function will have the form ...

  y = a·b^x . . . . . a = initial value, b = decay factor = 1 - decay rate

__

18.

The above equation will have a=15,000, representing the initial value of the car. It will have b=(1-0.125) = 0.875, the decay factor for the car's value. In the 7 years between your 18th and 25th birthdays, the car will have declined in value to ...

  y = $15000·0.875^7 ≈ $5890.44

When you turn 25, the car will be worth about $5890.

__

19.

We found three cars with a price under $15,000:

Nissan VersaChevrolet SparkMitsubishi Mirage

Of these, the Mirage gets the best mileage and has the most cargo space. (It also has the smallest engine.) The Spark has a continuously-variable transmission, not a 5-speed manual, so will be somewhat easier to drive. Its mileage is almost as good, but its range is about 10% less than that of the Mirage or Versa.

(Your curriculum may offer different choices. We cannot tell.)

Perhaps you got a Mitsubishi Mirage.

Find the perimeter of the figure to the nearest hundredth.




perimeter: about

ft

Answers

The answer is ; 36.85

im stuck, i dont know where i went wrong. Will brain list, pls help. Evaluate x³-2x²+3x-7/x-1​

Answers

Answer: hii

hopefully this helps you!

Step-by-step explanation:

Simplify the expression.

- Matthew <3

Arjun and Jasmine are selling flower bulbs for a school fundraiser. Customers can buy bags of windflower bulbs and bags of daffodil bulbs. Arjun sold 4 bags of windflower bulbs and 14 bags of daffodil bulbs for a total of $252. Jasmine sold 8 bags of windflower bulbs and 6 bags of daffodil bulbs for a total of $152. What is the cost each of one bag of windflower bulbs and one bag of daffodil bulbs?

A.
bag of windflower bulbs: $9, bag of daffodil bulbs: $20

B.
bag of windflower bulbs: $7, bag of daffodil bulbs: $16

C.
bag of windflower bulbs: $9, bag of daffodil bulbs: $18

D.
bag of windflower bulbs: $4, bag of daffodil bulbs: $21

Answers

Answer: D

Step-by-step explanation: im pretty sure its d because 21 is the right awnser let me know if im wrong hope it helps

v(x)=x^2-25
————-
2x^2+13x+15

Describe the domain in complete sentences.

Write the domain in inequality notation.

Answers

Answer:

  -∞ < x < -5 ∪ -5 < x < -3/2 ∪ -3/2 < x < ∞

Step-by-step explanation:

The domain of any polynomial is "all real numbers." The domain of any rational function excludes any values of the variable that result in the denominator being 0. The function is "undefined" there.

__

  [tex]v(x)=\dfrac{x^2-25}{2x^2+13x+15}=\dfrac{(x+5)(x-5)}{(x+5)(2x+3)}\qquad x\notin \{-5,-\dfrac{3}{2}\}[/tex]

The values x=-5 and x=-3/2 make the denominator of v(x) become 0, so those values are excluded from the domain of v(x). The function is "undefined" when its denominator is zero.

  -∞ < x < -5 ∪ -5 < x < -3/2 ∪ -3/2 < x < ∞

_____

Additional comment

The numerator and denominator factors (x+5) cancel each other, so there is no vertical asymptote at x=-5. Rather, the function has a "hole" there, where it is undefined. The limit as the function approaches x=-5 from either direction is v(x) = 10/7.

PLEASE HELP PLEASE PLEASE HELP PLEASE

Answers

Answer:

False

Step-by-step explanation:

basically it's asking you whether or not you can live on earth. you can't live at the other planets because they're either too far or too close to the sun.

4
Which equation does not have a solution?
A. -3d + 7 = -9
B. 8d + 7 = -4(-2d - 4)
C. 54+ 15 = 15
D. 2(d' + 6) = -2d - 12

Answers

Answer:

Option B

Step-by-step explanation:

A.)

-3d + 7 = -9

➝ -3d = -7 - 9

➝ -3d = -16

➝ d = -16/-3

➝ d = 16/3

Solution is d = 16/3

B.)

8d + 7 = -4(-2d - 4)

➝ 8d + 7 = 8d + 16

➝ 8d - 8d = 16 - 7

➝ 0 = 9

It has no solution.

C.)

➝ 5d + 15 = 15

➝ 5d = 15 - 15

➝ 5d = 0

➝ d = 5/0

➝ d = 0

Solution is d = 0

D.)

➝ 2(d + 6) = -2d - 12

➝ 2d + 12 = -2d -12

➝ 2d + 2d = -12 -12

➝ 4d = 24

➝ d = 24/4

➝ d = 6

Solution is d = 6

Hence,

(Option B) 8d + 7 = -4(-2d - 4) has no solution.

The difference between your income and your costs in a given time period is called which ?

1) liability

2) Cash-Flow Balance

3) Guaranteed Minimum

4) Cash cow

Please help thank you

Answers

Cash-flow balance is the answer

You deposit $1500 in an account earning 3.5% interest compounded monthly.

a. a. How much will you have in the account in 20 years?

b. b. How much interest will you earn?

Answers

Answer:

Answer:

\sf (x+14)^2+(y+5)^2=149(x+14)2+(y+5)2=149

Step-by-step explanation:

Standard equation of a circle:  \sf (x-a)^2+(y-b)^2=r^2(x−a)2+(y−b)2=r2

(where (a, b) is the center and r is the radius of the circle)

Substitute the given center (-14, -5) into the equation:

\sf \implies (x-(-14))^2+(y-(-5))^2=r^2⟹(x−(−14))2+(y−(−5))2=r2

\sf \implies (x+14)^2+(y+5)^2=r^2⟹(x+14)2+(y+5)2=r2

Now substitute the point (-7, 5) into the equation to find r²:

\sf \implies ((-7)+14)^2+(5+5)^2=r^2⟹((−7)+14)2+(5+5)2=r2

\sf \implies (7)^2+(10)^2=r^2⟹(7)2+(10)2=r2

\sf \implies 149=r^2⟹149=r2

Final equation:

\sf (x+14)^2+(y+5)^2=149(x+14)2+(y+5)2=149

How do you add 2 1/4 plus 3/4

Answers

Answer:

Step-by-step explanation: first  change 2 1/4 to a improper fraction

you are going to have 9/4 next add 9/4 plus 3/4 which will be equal to12/4 which is the same as 3

A triangle has a perimeter of 16x + 4. If Side 1 is 3x + 2, Side 2 is 8x + 7, what is the measure of Side 3?

Answers

Answer:

5x - 5

Step-by-step explanation:

To find the missing side, add the two sides together and subtract them from the perimeter.

side 1 + side 2

3x + 2 + 8x + 7

combine like terms

11x + 9

Subtract from the perimeter

16x + 4 - (11x + 9)

rewrite as an addition problem, so you need to change the signs inside the parentheses.

16x + 4 + (-11x -9)

Now combine like terms

5x - 5

For the polynomial f(X)=2x^3-9x^2+11x-20
As
X -> -♾️,f(X) -> ♾️

A. True
B. False

Answers

Answer:

False

Step-by-step explanation:

I'm assuming its because x isn't negative infinity because the leading coefficient is positive

can some one help, Write the inequality 3x - y > -4 in slope intercept form​

Answers

Answer:

[tex]y < 3x+4[/tex]

short explanation:

1) the common view of slope-interception form is:

y < slope*x+intercept or y>slope*x+intercept. Then

2) according the form above:

3x-y>-4;

y<3x+4.

can someone help with this?

Answers

Answer:

4) r = 10 yd

   d = 20 yd

5) r = 7 in

   d = 14 in

6) r = 15 ft

   d = 30 ft

7) r = 23 in

   d = 46 in

8) r = 16 yd

   d = 8 yd

9) r = 21 ft

   d = 42 ft

Step-by-step explanation:

Diameter = 2 x radius

*diameter (d)*

*radius (r)*

help pleaseeee this harddd

Answers

Answer:

Step-by-step explanation:

Step-by-step explanation:

#1 1.6

#2 1:2

#3 $160.00

#4 1,800

#5 $360

#6 2

#7 250

I hope I helped you

I'm sorry for late

how do i multiply 30 by -20

Answers

Multiplication of a positive number and negative number

   ⇒ is like any other multiplication

      30 * -20 = 30 * ((-1) * 20) = 30 * -1 * 20 = (-1) * 600 = -600

Hope that helped!

A parallelogram has a base of 12 meters and a height of 7 meters. What is the area?

Answers

Answer:

Area = 84 sq meters

Step-by-step explanation:

Area of a parallelogram is:

A = b•h

A = 12•7

A = 84 square meters

In a particular​ city, 21 in 1.5 million people have been struck by lightning. What is the experimental probability of being struck by lightning in this​ city?

Answers

21/(1.5 million) = 0.0014%

Please help me yall… my math is due tommorrow!

Answers

Answer:

Step-by-step explanation:

Remark

I think the easiest way to do this is to calculate the probability of those that are 12 to 24. Then subtract the decimal you get from 1. That saves you adding up 3 numbers to get the same answer.

Givens

Total number of movie goers = 3880

Total number that are between 12 and 24 = 1180

Solution

Probability of a random person being drawn from 1180

people between 12 and 24 = Those between 12 and 24 = 1180

Total Number = 3880

P(12 - 24) = 1180 / 3880

P(12 -24) = 0.3041

Remember, that's not what you want. You want everyone else

P(not(12-24)) = 1 - 0.3041

Answer 0.6959

How many triangles can be constructed with angles measuring 110° 50° and 10°


Pls explain in detail so I can understand

Answers

Answer

0

Step-by-step explanation:

Because 110+50+10= 170 and every triangle has 180º

the eye of a hurricane is a relatively calm circular region in the center of the storm the diameter of the eye is typically about 20 miles. If the eye of a hurricane is 20 miles in diameter, what is the area of the land that is underneath the eye? answer in square miles

Answers

Answer:

A= 314.159 m2

Step-by-step explanation:

Simple Give Brainliest Please

There is a bag filled with 3 blue, 4 red and 5 green marbles.
A marble is taken at random from the bag, the colour is noted and then it is not replaced.
Another marble is taken at random.
What is the probability of getting 2 different colours?​

Answers

Answer:

Using the hypergeometric distribution, it is found that there is a 0.4286 = 42.86% probability of getting 2 of the same colour.

The marbles are chosen without replacement, hence the hypergeometric distribution is used to solve this question.

What is the hypergeometric distribution formula?

The parameters are:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

In this problem:

There is a total of 3 + 4 = 7 marbles, hence N = 7.

Of those, 3 are blue, hence k = 3.

2 marbles will be taken, hence n = 2.

Step-by-step explanation:

Tomijia and her nine classmates took a standardized test. Their scores were: 42, 44, 56, 71, 74, 83, 89, 90, 90, 92 If Tomijia received an 89 on the test, which percentile is she in?

Answers

The percentile of Tomijia's scores is her score as a percentage

If Tomijia received an 89 on the test, she is in the 70th percentile

How to determine the percentile?

The score of the tests are given as:

42, 44, 56, 71, 74, 83, 89, 90, 90, 92

From the above list of scores, the score 89 is at the 7th position.

So, we have:

Tomijia = 7/10

Express as percentage

Tomijia = 70%

Hence, if Tomijia received an 89 on the test, she is in the 70th percentile

Read more about percentiles at:

https://brainly.com/question/2884595

PLEASE HELP ILL GIVE THANKS, 5.0, AND BRAINLIEST TO WHOEVER ANSWERS CORRECTLY PLEASE HELP AND ILL GIVE A HIGH POINT COUNT
Sophie bikes at a
speed of s miles per hour. Her friend Rana is slower, her biking
speed 1S only r miles per hour.
Today the girls went for 20 miles trip, each girl was biking at her usual speed. How
long did Sophie wait for Rana after her own arrival to the finish?

Answers

Answer:

if Rama road  1 mph  Sophie waited  (20-4) = 16 hours

Step-by-step explanation:

Sophie road 5 mph for 20 miles

distance = rate of speed times time traveled

d = st

20 =5t

t = 20/5 = 4 hours

Rana road r mph for 20 mile

d=rt

20=rt

t =20/r

Sophie waited  20/r - 4  hours

20/r -4 =  (20-4r)/r

if Rana road at   4 mph,  Sophie waited (20-4(4))/r =  4/4 = 1 hour

If Rana road at  3 mph,  Sophie waited (20-4(3))/3 = 8/3 = 2 hours 40 minutes

if Rama road at 2 mph  Sophie waited (20-4(2))/2 = 12/2 = 6 hours

if Rama road  1 mph  Sophie waited  (20-4) = 16 hours

An equilateral triangle has a perimeter of 90 inches. Find the area of the equilateral triangle, I simplest form.

Answers

Answer:

389.7 square inches

Step-by-step explanation:

equilateral triangle = each side has the same lenght

90 inches / 3 = 30 inches each side

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

Pythagoras

30^2 = 15^2 + x^2

900 - 225 = x^2

v 675 = x

25.98 = x

x = height

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

Area = BxH/2

B = 30 inches

H = 25.98

(30 x 25.98) /2 = 389.7 square inches

Answer:

390 in²

Step-by-step explanation:

Length of the sides of the triangle = 90/3 = 30 in

area of a triangle = (base × height)/2

height of an equilateral triangle with sides of length x  [tex]=\frac{\sqrt{3} }{2}x[/tex]

Then the height of our triangle [tex]=\frac{\sqrt{3} }{2} \times30=26[/tex]

Conclusion:

area of the triangle = (30 × 26)/2 = 390 in²

What is the value of 7 – 18(-2 1/3+ 2/3)

Answers

Answer:

The answer is 37.

Step-by-step explanation:

First of all we use Pemdas. Add the parantheses first. So its 7-18(-5/3) then you multiple the -18 to 5/3 Because after Parantheses its Exponents multiplication. So it becomes 30. Then you add 7 to get 37. I hope this is helpful.

Other Questions
v(x)=x^2-25 - 2x^2+13x+15Describe the domain in complete sentences.Write the domain in inequality notation. How many triangles can be constructed with angles measuring 110 50 and 10Pls explain in detail so I can understand How do I make my essay more interesting to making the reader invested into it Extend the country], and you take in a greater variety ofparties and interests; you make it less probable that amajority of the whole will have a common motive toinvade the rights of other citizens.-James Madison,Federalist, no. 10Which Federalist ideas are expressed in this excerChoose two correct answers.their belief in creating a large country of diverseintereststheir faith in representative governmenttheir fear of abuse of power by the peopletheir opposition to adding a bill of rights to theConstitutiontheir support for a bicameral legislature im stuck, i dont know where i went wrong. Will brain list, pls help. Evaluate x-2x+3x-7/x-1 help pleaseeee this harddd Your car insurance for the first 6 months is $50 per month.The second 6 months of the year costs $40 a month.How much do you pay in a year? Which term describes an idea or a feeling suggested by a word? Which of the following does not takes place in the oral cavity? [Anatomy question] A: absorptionB: mechanical breakdownC: chemical breakdownD: propulsion Kinetic energy is proportional to?v2workva Write the equation for each translation of the graph y=Ix+2I.A.) one unit upB.) one unit downC.) one unit to the leftD.) one unit to the right The lateral area of a cone is 9.81 in. The radius is 1.4 in. Find the slant height. A, B and C are points on the line 2x+y=8DCE is a straight line.AB:BC=2:1EC:DC=1:2Work out the ratio Area of triangle AEC : Area of triangle BCDGive your answer in its simplest form. WILL GIVE BRAINLIEST, THANKS, AND 5 STARS! PLEASE HELP EXPLAIN TO ME IN WORDS!QUESTION IN SCREENSHOT!Also: hows your day going, how are you feeling? What is the United States government equivalent of the Roman Senate and Assemblies? 12 decimeters = dm deka will get brainiest if right When an EC2 instance is being modified to have more RAM, is this considered Scaling Up or Scaling Out? Pls write me fast whats the answer 8(1 - 6p) - 2(6p + 7) How long does it take for a maggot to turn into a fly. What year did the constitutional convention take place?.