Factor –7x3 + 21x2 + 3x – 9 by grouping.

Answers

Answer 1

Answer:

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

Step-by-step explanation:


Related Questions

I need help finding the value of X.

Answers

Answer:

x=25

Step-by-step explanation:

43=2x-7 (since the midpoint separate a line into two equal halves)

43+7=2x

50/2=x

25=x

Answer:

x=25

Step-by-step explanation:

Since M is the midpoint, you can set your formula up as

43 = 2x-7

43+7=2x

50/2=x

25=x

PLEASE HELP, I HAVE ONE WEEK OF SCHOOL!

Answers

9514 1404 393

Answer:

  2.  (b) 6 feet by 18 feet

  3.  -5, -1

Step-by-step explanation:

2. Perhaps the easiest way to answer this is to check to see what the areas are of the offered choices:

  a) 7·19 = 133 . . . . numbers are odd, so the answer is odd, incorrect

  b) 6·18 = 108 . . . . correct choice

  c) 12·24 = 288

  d) 5·17 = 85 . . . . again an odd number

__

If you were to solve this by factoring, you would be looking for factors of 108 that have a difference of 12.

  108 = 1·108 = 2·54 = 3·36 = 4·27 = 6·18 = 9·12

The differences are 107, 52, 33, 23, 12, 3. The dimensions you want are 6 and 18 feet.

_____

3. Completing the square is easier if the quadratic has a leading coefficient of 1. Here, all of the coefficients are divisible by 2, so we can simplify this to ...

  x^2 +6x = -5 . . . . . . divide both sides by 2

Now, we complete the square by adding the square of half the linear term coefficient.

  x^2 +6x +9 = 4 . . . . add (6/2)^2 = 9 to both sides

  (x +3)^2 = 4 . . . . .  write as a square

  x +3 = ±2 . . . . . . . take the square root

  x = -3 ±2 = -5, -1 . . . . add -3 to both sides

The solutions are -5 and -1.

Here is the problem

Answers

Answer:

5 =x

Step-by-step explanation:

The top and the bottom are the same length

17 = 3x+2

Subtract 2 from each side

17-2 = 3x+2-2

15 =3x

Divide by 3

15/3 = 3x/3

5 =x

Answer:

x = 5

Step-by-step explanation:

3x + 2 = 17

3x + 2 - 2 = 17 - 2

3x = 15

3x ÷ 3 = 15 ÷ 3

x = 5

What are 3 attributes of a Square based pyramid

Answers

Answer:

It has 5 Faces.

The 4 Side Faces are Triangles.

The Base is a Square.

It has 5 Vertices (corner points)

It has 8 Edges.

Step-by-step explanation:

btw you can choose 3

PLEASE HELP!!

WILL MARK BRAINLIEST!

What is the measure of arc AB?

Answers

Answer:

arc AB = 45°

Step-by-step explanation:

The central angle ABC is equal to the measure of the arc that subtends it, so

AB = ∠ ABC = 45°

please help with this

Answers

99 I think if not I am sooo sorry

Step-by-step explanation:

f(x) =x-1 and when we put 0 from x our answer is -1 and put 1 answer is 0 ........ for this f(x) must be x-1. g(x)= f(x)+ 4

Lana and Jeff each randomly surveyed 15 students about their favorite types of movies. Are these samples representative of the school population? Explain.

No, the samples are not large enough to be representative.

Yes, both samples are random, so they are representative.

No, the samples might include some of the same people, so they are not representative.

Yes, the samples do not include the same people, so they are representative.

Answers

Answer:

D but see below.

Step-by-step explanation:

This question is badly thought out. 15 might be enough to be representative if the school only contains about 100 people.If B is true then it would be the answer.If D was true, it would be the answer. If C was true, it could be the same answer.

So you have a question that has no clear answer. If Jeff took grade 11 and Lana took grade 12, that would make the answer much clearer. At least there would be no duplicates.

If you could refine the question a little more, you might get a clearer answer. I don't think this question should be asked and I sure don't think you should try and give an answer.

However that's not how schools work. So I would pick D, but by some bizarre method, the asker (like edge) might think of a way to make A B or C true.

A rectangular auditorium seats 1564 people. The number of seats in each row exceeds the number of rows by 12. Find the number of seats in each row

Answers

Answer:

# of rows: 34

# of seats in each row: 46

Step-by-step explanation:

r - # of rows

s - # of seats in each row

r * s = 1564

s = r + 12

(34) * (46) = 1564

(46) = (34) + 12

Hope this helps!

Which of the following statements is true when regarding creating frequency tables for the following observationsa. ?
a. The sum of the frequencies will be equal to the total number of data points.
b. To calculate the number of classes it is best to divide the average number by 2.
c. To find the number of classes, you should split the data into two main classes first.
d. The lower limit will be 0 in this example.

Answers

i think the answer is c.

Under an insurance policy, a maximum of five claims may be filed per year by a policyholder. Let Pn be the probability that a policyholder files n claims during a given year, where n 0,1,2,3,4,5. An actuary makes the following observations:
i) Pn≥ 2pn+1 for n= 0, 1,2, 3,4
ii) The difference between pn and pn+1 is the same for n 0,1,2, 3,4
iii) Exactly 40% of policyholders file fewer than two claims during a given year Calculate the probability that a random policyholder will file more than three claims during a given year.
A) 0.14
B) 0.16
c) 0.27
D) 0.29
E) 0.33

Answers

D) 0.29 is the answer i think

NO LINKS OR ELSE YOU'LL BE REPORTED! Only answer if you're very good at Math.No guessing please.

Martin puts two bowls of fruits out for his friends.The bowl of grapes has 9 green grapes and 16 red grapes.The bowl of tangerines has 7 seeded and 3 seedless tangerines.

Martin's friend chooses a random grape and a random tangerine.What is the probability that she chooses a green grape and a seedless tangerine?

Enter the answer in the box below as a fraction.

[tex] \frac{?}{?} [/tex]

Answers

Answer:

27/250

Step-by-step explanation:

Green grape is 9/25

seedless is 3/10

Since it’s a compound probability you multiple them to get 27/250

Answer:

27/250

Step-by-step explanation:

Please solve this..you have to find x

Answers

Answer:

x=41/4

Step-by-step explanation:

According to the Secant Theorem, a(a+b)=c(c+d)

Therefore, 3(3+4x+12)=2(2+8x),  12x+45=16x+4, x=41/4

X=41/4

Step by step explanation

Can someone help me with 8,9 ??!!

Answers

Answer:

15 / 2437/52

Step-by-step explanation:

8 .) Probability of students has no pets in senior = No. of outcomes favourable / Total no.of outcome

= 15 / 24

9.) Probability of students has pets in junior = No.of outcomes favourable / Total no. of outcomes

= 37/52

simplify -2 minus square root of 15 over 2

Answers

The answer is -3.9364916731.

List all the factors of 9. The factors of 9, from least to greatest, are and​

Answers

Answer:

1 9 3

Step-by-step explanation:

i think only this much

Answer:

1,3 and 9

As Nine is divisible by 1,3 and 9

Evaluate this piecewise function at x = -8 and x = 4.

Answers

Answer:

option D :

f(-8) = -2 ; f(4) = 3

Step-by-step explanation:

f(-8) = ³√-8 = -2

f(4) = 3 (the constant function)

Help would be appreciated:)

Answers

Answer:c

Step-by-step explanation:

The would be C. 120 degrees !!!

Please help. Confused on this questions.

Answers

Answer:

Step-by-step explanation:

The key here is to find out how long it will take Justin to triple his money, and then use that number of years in Hailey's equation. If Justin starts with $940, he will triple his money when he has $2820 (940*3). We need to find out how long it takes him to do this using the equation

[tex]A(t)=P(1+\frac{r}{n})^{nt}[/tex]where A(t) is the tripled amount of money, P is the initial investment, r is the interest rate in decimal form, n is the number of compoundings done per year, and t is the time in years. Filling in and solving for t:

[tex]2820=940(1+\frac{.07625}{12})^{12t[/tex] which simplifies a bit to

[tex]2820=940(1+.0063541667)^{12t[/tex] and a bit more to

[tex]2820=940(1.0063541667)^{12t[/tex] Begin to solve for t by dividing both sides by 940 to get:

[tex]3=(1.0063541667)^{12t[/tex] and then take the natural log of both sides to get the t alone eventually. Taking the natural log on the right side enables us to move the 12t down in front. So doing all of that at the same time:

[tex]ln3=12tln1.0063541667[/tex] and divide both sides by ln(1.0063541667):

[tex]173.4450855=12t[/tex] then finally divide both sides by 12 to get

t = 14.5 years. Now we use that number of years to find out how much Hailey will have.

[tex]A(t)=940(1+\frac{.0825}{4})^{(4)(14.5)}[/tex] which simplifies a bit to

[tex]A(t)=940(1+.020625)^{58[/tex] and a bit more to

[tex]A(t)=940(1.020625)^{58[/tex] and

A(t) = 940(3.26768151) so in 14.5 years, Hailey will have

A(t) = $3071.62

Find the remainder when x³ - ax² + 6x - a is divided by x - a​

Answers

Answer:

Solution is on pic hope it helps you

If the air temperature at ground level is 30°F, the air temperature x miles high is given by T(x) = 30 - 19x. Determine the altitudes at which the air temperature is from 11°F to 1.5°F.​

Answers

Answer:

21

Step-by-step explanation:

what are the best ways for your business and how do they get neck debt from the air and to get rid from a good or

Solve the equation 2/3x=-1/2x+5 what is the first step to isolate the variable term on one side of the equation

Answers

Answer:

x= 30/7

Step-by-step explanation:

See image below:)

Answer:

[tex]x=4\frac{2}{7}[/tex]

Step-by-step explanation:

2/3x = - 1/2x + 5

2/3x + 1/2x = - 1/2x + 1/2x + 5

[tex]1\frac{1}{6}x=5[/tex]

[tex]\frac{1\frac{1}{6}x}{1\frac{1}{6} } =\frac{5}{1\frac{1}{6} }[/tex]

[tex]x=4\frac{2}{7}[/tex]

Prove that the following formulas are constants by two methods (set table and equivalent transformations) :
1 . ( m →(N v Q)) →((M→N) v (M→Q))
2.((T v U) → V) → (T → (U → V))

Answers

I don’t even know 22

Ashley went to a baseball game the game started at 11:37 am and it was 3 hours 50 minutes long when did the game end

Answers

Answer: The game will end at 3:27 pm.

Step-by-step explanation: 50 minutes from 11:37 am is 12:27 pm, and 3 hours from 12:27 pm is 3:27 pm.

What is the fraction: 9/8 to the 2nd power?

Answers

Answer:

9/8 x 9/8 = 81/64 in fraction form.

Hi there!  

»»————- ★ ————-««

I believe your answer is:  

[tex]\frac{81}{64}[/tex]

»»————- ★ ————-««  

Here’s why:

⸻⸻⸻⸻

[tex]\boxed{\text{Calculating the answer...}}\\\\(\frac{9}{8})^2\\\\\text{Recall the power of a fraction rule: } (\frac{a}{b})^x =\frac{a^x}{b^x}\\\\\rightarrow (\frac{9}{8})^2 =\frac{9^2}{8^2} =\boxed{\frac{81}{64}}[/tex]

⸻⸻⸻⸻

»»————- ★ ————-««  

Hope this helps you. I apologize if it’s incorrect.  

3. Calculate the following- show all working out
a)7/8 of R60,00​

Answers

Answer:

5250

Step-by-step explanation:

a. 7/8 of 60,00

a [tex]\frac{7}{8} * 60,00[/tex]

[tex]\frac{7*60,00}{8}[/tex]

[tex]\frac{42,000}{8}[/tex]

[tex]5250[/tex]

simplify: x0 y-3 / x2 y-1

Answers

[tex] \frac{x {}^{0}y {}^{ - 3} }{x {}^{2}y {}^{ - 1} } \\ = \frac{1y {}^{ - 3} }{ {x}^{2}y {}^{ - 1} } \\ = \frac{1 \times 1}{ {x}^{2} y {}^{2} } \\ \\ = \frac{1}{ {x}^{2}y {}^{2} } [/tex]

Step by Step Explanation:

Evaluate the power: Any non-zero expression raised to the power of 0 equals 1Simplify: Simplify the expressionCalculate the product: Any expression multiplied by 1 remains the same.

☆彡Hanna

#CarryOnLearning

solve the system of equations y=3x y=x^2-18

Answers

Answer:

Point Form:

(6,18), (-3,-9)

Equation Form:

x=6, y=18

x=-3, y=-9

Step-by-step explanation:

Solve for the first variable in the first equation, then substitute the result into the other equation.

Answer:

x=-3 , x=6

so

y=-9 or y=18

PLEASE HELP!

WILL MARK BRAINLIEST!

Find the measure of the indicated angle to the nearest degree.

Please provide an explanation, I’m trying to learn.

Answers

Answer:

B =53.15010235

Step-by-step explanation:

Since this is a right triangle, we can use  trig functions

tan theta = opp / adj

tan B =  20 /15

Take the inverse tan of each side

tan ^ -1 ( tan B) = tan ^-1( 20/15)

B =53.15010235

In analyzing a line graph, why is slope important?
a The slope should be negative,
C. The spacing for each axis must be chosen
so that the line reflects a positive slope,
b. The slope of the line reflects the actual d. The slope of a line is not important in
trend of the data,
analyzing a line graph,
Please select the best answer from the choices provided
B
O O O O
С
D
Mark this and retum
Save and Exit
Next
Submit

Answers

Answer:

The slope of the line reflects the actual d.

What the other dude said

What is the factored form of y=-2x^2-8x+0​

Answers

Answer:

(2x-4()(x-2)

Step-by-step explanation:

this is how it looks when factorised

Answer:

y=-2x^2-8x

you can use a factor form helper and from that it can show you examples on how to solve it

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