Answers
Answer: 2x^3 - 7x^2 + 6x - 9 which is choice D
=========================================
Work Shown:
One way is to use the distribution rule two times
(x-3)(2x^2-x+3) = y(2x^2-x+3) ........... replace (x-3) with y
(x-3)(2x^2-x+3) = y(2x^2)+y(-x)+y(3) .... distribution rule
(x-3)(2x^2-x+3) = 2x^2*(y) - x(y) + 3(y)
(x-3)(2x^2-x+3) = 2x^2*(x-3) - x(x-3) + 3(x-3) .... replace y with x-3
(x-3)(2x^2-x+3) = 2x^3-6x^2 - x^2 + 3x + 3x - 9 ... distribution rule
(x-3)(2x^2-x+3) = 2x^3 - 7x^2 + 6x - 9
----------------------------
Or we can use the box method (see the attached image below). This is a visual way to organize the terms. You'll probably notice that the box method is basically the distribution rule. Each row is one distribution being applied. In row 1, we have x distributed to (2x^2-x+3). In row 2, we have -3 distributed to (2x^2-x+3). I color coded the table cells to highlight the like terms. Those like terms combine to -6x^2-x^2 = -7x^2 and 3x+3x = 6x as shown in the steps for the distribution above.
Each interior cell in the box is found by multiplying the corresponding outer terms. For example, in the first row, first column we have x^3 which is the result of multiplying the outer x and x^2 terms.
The correct choice is D) [tex]\(2x^3 - 7x^2 + 6x - 9\)[/tex].
To find the product[tex]\((x - 3)(2x^2 - x + 3)\)[/tex], we can use the distributive property:
[tex]\((x - 3)(2x^2 - x + 3) = x(2x^2 - x + 3) - 3(2x^2 - x + 3)\)[/tex]
Now, distribute the terms:
[tex]\[= x \cdot 2x^2 - x^2 + 3x - 3 \cdot 2x^2 + 3x - 9\][/tex]
Combine like terms:
[tex]\[= 2x^3 - x^2 + 6x - 6x^2 + 6x - 9\][/tex]
Combine the x terms:
[tex]\[= 2x^3 - 7x^2 + 6x - 9\][/tex]
Therefore, the expression [tex]\((x - 3)(2x^2 - x + 3)\)[/tex] is equal to \[tex](2x^3 - 7x^2 + 6x - 9\)[/tex].
So, the correct choice is D) [tex]\(2x^3 - 7x^2 + 6x - 9\)[/tex].
Related Questions
Which equation represents this problem?
Carol's age is three more than two times Lindsay's age. Carol is 39 years old. How old is Lindsay?
Let l = Lindsay's age in years.
3l + 2 = 39
2l–3=39
3l–2=39
2l + 3 = 39
Answers
Answer:
2l + 3 = 39
Step-by-step explanation:
the equation is 3 + 2L = C, where L is Lindsay's age and C is Carol's age
3 + 2L = 39
A manufacturer of shipping boxes has a box shaped like a cube. The side length is (5a + 4b). What is the volume of the box in terms of A and b
Answers
The volume of the cube would be S^3, where S is the length of the side.
Volume = (5a + 4b)^3
Which becomes:
(5a+4b)(5a+4b)(5a+4b)
Multiply the first two sets of parenthesis by each other:
(25a^2+40ab+16b^2)(5a+4b)
Now multiply that by the 3rd set of parenthesis to get:
125a^3+300a^2b + 240ab^2 + b^3
PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!
If the table is that of f(x), find a point that lies on the graph of f-^1(x).
Answers
Answer: D
Step-by-step explanation:
Inverse is when the x's and y's are swapped
x | y Inverse
-3 | 5 (5, -3)
-2 | -3 (-3, -2)
0 | 3 (3, 0)
1 | -5 (-5, 1) ← this matches choice D
2 | 6 (6, 2)
3 | 10 (10, 3)
3q, –3p, 3pq, 13p
Question 4 options:
3 q and 3 pq
3q, –3p, and 3pq
–3p and 13p
–3p, 3pq, and 13p
Answers
Ralph sold brownies for ?$0.27 a piece in order to earn money to buy baseball cards. If the cards cost ?$0.81 per? pack, and if Ralph had no money left over after buying? them, what is the least number of brownies he must have? sold
Answers
Answer:
3 brownies
Step-by-step explanation:
To find this answer we need to divide the 0.81 by 0.27 to find out how many brownies total 0.81:
0.81 ÷ 0.27 = 3
So he needs to sell 3 brownies.
Hope this helps!
Help me with these math questions........ WITH SCREENIES
Answers
Answer: 6.3093
Step-by-step explanation:
[tex]3^{\frac{x}{5}} = 4[/tex]
[tex]ln3^{\frac{x}{5}} = ln4[/tex]
[tex]\frac{x}{5} ln3 = ln4[/tex]
xln3 = 5ln4
[tex]x = \frac{5ln4}{ln3}[/tex]
x = 6.3093
************************************************************
Answer: 5, 3, [tex]\frac{1}{5}[/tex], D
Step-by-step explanation:
a) x ≤ 0 so, f(-5) = | -5 | = 5
x ≤ 0 so, f(-3) = | -3 | = 3
x > 0 so, f(5) = [tex]\frac{1}{5}[/tex]
b) graph D
************************************************************
Answer: [tex]\frac{\pi}{12}[/tex]
Step-by-step explanation:
[tex]\frac{25\pi}{12} - \frac{2\pi}{}[/tex]
= [tex]\frac{25\pi}{12} - \frac{24\pi}{12}[/tex]
= [tex]\frac{\pi}{12}[/tex]
if f(x)=5x-7 then f^-1=__ _
Answers
Answer:
f^-1(x) = (x +7)/5
Step-by-step explanation:
Set x = f(y) and solve for y.
... x = 5y -7
... x+7 = 5y
... (x+7)/5 = y . . . . this is the inverse function
f^-1(x) = (x +7)/5
Montel sold 13 popcorn buckets and sold 13 fruit baskets for a fundraiser. The fruit baskets coast $20.75 each . If Montel raised a total of $469, how much did each popcorn buckets coast
Answers
Answer:
The popcorn buckets each cost around $15.34.
Step-by-step explanation:
Use the Distance Formula and the Pythagorean Theorem to find the distance between each pair of points. M (5, −3) and N (4, −8)
Answers
well, we don't have to use the pythagorean theorem per se, only the distance formula, since the distance formula is really the pythagorean theorem in disguise.
[tex]\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ M(\stackrel{x_1}{5}~,~\stackrel{y_1}{-3})\qquad N(\stackrel{x_2}{4}~,~\stackrel{y_2}{-8})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ MN=\sqrt{[4-5]^2+[-8-(-3)]^2}\implies MN=\sqrt{(4-5)^2+(-8+3)^2} \\\\\\ MN=\sqrt{(-1)^2+(-5)^2}\implies MN=\sqrt{26}[/tex]
Results from choosing a counter 20 times, green 10, yellow 3, blue 7. What is the experimental probability of geting blue?
Answers
Find the length of the hypotenuse
Answers
We know that : In a Triangle, If Two Angles are Equal then Corresponding Sides with Respect to those Two Angles Should be Equal.
In the Given Right Angled Triangle, There are Two Angles which are Equal to 45°. It means The Lengths of the Sides Corresponding to those Equal 45° Angles should be Equal.
It Means The Given Right Angled Triangle is also an Isosceles Triangle
⇒ The Other Side of the Triangle is [tex]3\sqrt{2}[/tex]
As it is a Right Angled Triangle :
[tex]\mathsf{\implies (Hypotenuse)^2 = (3\sqrt{2})^2 + (3\sqrt{2})^2}[/tex]
[tex]\mathsf{\implies (Hypotenuse)^2 = 18 + 18}[/tex]
[tex]\mathsf{\implies (Hypotenuse)^2 = 36}[/tex]
[tex]\mathsf{\implies (Hypotenuse) = 6}[/tex]
The Length of Hypotenuse is 6
What is the length of cloth needed to make 18 shirts if each shirt is made from 0.8 yards of material?
Answers
Answer:
14.4 yards
Step-by-step explanation:
Each shirt needs 0.8 yards so 18 shirts needs 18 * 0.8 = 14.4 yards of material.
14.4 yards of material will be needed to make 18 shirts.
What is multiplication?Multiplication is when you take one number and add it together a number of times.
Given that, one shirt is of 0.8 yards of material,
18*0.8 = 14.4
Hence, 14.4 yards of material will be needed to make 18 shirts.
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A polynomial function has a root of zero with multiplicity one, and root of two with multiplicity four. If the function has a negative leading coefficient, and is of odd degree, which of the following is true.
- the function is positive on (-infinity, 0)
-the function is negative on (0,2)
-the function is negative on (2,infinity)
-the function is positive on (0, infinity)
Answers
Answer: A, B, and C
Step-by-step explanation:
root of zero (x = 0) with multiplicity of 1 (x = 0)¹ means that the graph CROSSES the axis at x = 0
root of two (x = 2) with multiplicity of 4 (x = 2)⁴ means that the graph TOUCHES the axis at x = 2
WHY?
odd numbered multiplicity crosses the x-axiseven numbered multiplicity touches the x-axis (it is a turning point)Leading Coefficient (end behavior of right side):
If the leading coefficient is positive, then right side goes to +∞If the leading coefficient is negative, then right side goes to -∞Degree of polynomial (left side behavior):
If degree is even, then left side is the same as the right sideIf the degree is odd, then left side is opposite of right sideThe given polynomial has a negative leading coefficent and odd degree so the left side goes to +∞ and the right side goes to -∞
OBSERVE INTERVALS:
(-∞, 0) is above the x-axis so POSITIVE(0, 2) is below the x-axis so NEGATIVE(2, +∞) is also below the x-axis x=2 was a turning point so NEGATIVESee graph to confirm statements above
Answer:
A, B, and C
Step-by-step explanation:
Had the same question on Edge :)
The graph of f(t) = 6 x 2^t shows the value of a rare coin in year t. What is the meaning of the y-intercept?
Answers
Hence, f(t) = 6 × 2^0 = 6.
y = 6 at y-intercept.
Answer: The meaning y-intercept is the initial value of a rare coin is 6.
Step-by-step explanation:
Given : The graph of [tex]f(t) = 6\times 2^t[/tex] shows the value of a rare coin in year t.
The y- intercept is the point on Cartesian plane when the graph intersects y axis. It given the initial value of the function by substituting the value of independent variable as zero.
i.e. , we need to put t=0, we get
[tex]f(0) = 6\times 2^0=6[/tex]
The meaning y-intercept is the initial value of a rare coin is 6.
how can we write 128 in exponent form?
Answers
[tex] log_{n }(128) [/tex]
Answer: 2⁷
Step-by-step explanation:
128
∧ 2 64 ∧ 2 32 ∧ 2 16 ∧ 2 8 ∧ 2 4 ∧ 2 2128 = 2 * 2 * 2 * 2 * 2 * 2 * 2
= 2⁷
PLEASE NEED HELP ASAP WILL GIVE 50 POINTS
What is the value of x?
Enter your answer in the box.
x =
Answers
Answer:
x = 32
Step-by-step explanation:
This is an equilateral triangle, all three sides equal. Since all three sides are equal, all three angle are equal. 180/3 = 60. That means each angle is equal to 60 degrees.
2x-4 = 60
Add 4 to each side
2x-4+4 = 60+4
2x =64
Divide each side by 2.
2x/2 = 64/2
x = 32
The graph of the function f(x) is shown below. When f(x) = 0, determine x
Answers
Answer:
When f(x) is 0, then x is -1.8.
Step-by-step explanation:
To find this, you simply have to look for the place where the line crosses the x axis. This is where y (or f(x)) is equal to 0. Since this graph only crosses that axis at x = -1.8, that is the number we are looking for.
When f(x)=0,
[tex]x = - 1.8[/tex]
EXPLANATION
The given graph represents a polynomial function.
The roots of f(x) are the x-intercepts of the function.
The x-intercepts are the x-values of the points where the graph of the polynomial function meets the x-axis.
From the graph, the only point where the graph meets the x-axis is
[tex](-1.8,0)[/tex]
At this point f(x)=0 and
the x-value of this point is
[tex]x = - 1.8[/tex]
A seamstress uses 12 yards of fabric to make 3 costumes for students in the chorus. How many yards will she need to make costumes for all 25 students in chorus?
Answers
Answer:
100 yards
Step-by-step explanation:
It takes 4 yards of fabric to make a costume for one student. She needs to make costumes for every student in chorus, so you just multiply this number by 25 and get 100 yards.
Answer:
100 yards.
Step-by-step explanation:
We have been given that a seamstress uses 12 yards of fabric to make 3 costumes for students in the chorus.
We will use proportions to solve the given problem.
[tex]\frac{\text{Yards of fabric}}{\text{Costumes}}=\frac{12}{3}[/tex]
[tex]\frac{\text{Yards of fabric}}{25}=\frac{12}{3}[/tex]
[tex]\frac{\text{Yards of fabric}}{25}*25=\frac{12}{3}*25[/tex]
[tex]\text{Yards of fabric}=4*25[/tex]
[tex]\text{Yards of fabric}=100[/tex]
Therefore, 100 yards of fabric is needed to make costumes for 25 students.
Dean has 6 2/5 cups of yogurt. If it takes 4/5 cup of yogurt to make a fruit smoothie, how many smoothies can he make?
Answers
Answer:
8
Step-by-step explanation:
Change mixed number to decimal 6 2/5 = 6.4
Change needed fraction to decimal 4/5 = 0.8
Divide yogurt by yogurt needed 6.4 / 0.8 = 8
Working the problem like this will help you with any same type of problem.
If this helped a Brainliest ,Rating ,and/or a thanks will be appreciated
Answer: He can make 8 smoothies.
Step-by-step explanation:
Given : The total amount of yogurt Dean has = [tex]6\dfrac{2}{5}[/tex] cups
In Improper fraction , it will be :
[tex]6\dfrac{2}{5}=\dfrac{6\times5+2}{5}=\dfrac{32}{5}[/tex]
Also, the amount of yogurt required for a fruit smoothie = [tex]\dfrac{4}{5}[/tex]
Now , The number of smoothies he can make = (Total amount of yogurt Dean has) ÷ (amount of yogurt required for a fruit smoothie )
[tex]=\dfrac{32}{5}\div\dfrac{4}{5}\\\\=\dfrac{32}{5}\times\dfrac{5}{4}=8[/tex]
Hence, he can make 8 smoothies.
Identify a pattern and sequence and fine the next number in the pattern. 54,52,26,24,_,_,_
Answers
Answer:
54, 52, 26, 24, 22, -6, -4
Step-by-step explanation:
Curtis traveled a distance of 12 miles in 2 hours from the park to his home. What was his average speed in miles per hour?
Answers
*(miles/hour) & (miles per hour) mean the same thing, by the way
Put the 12 miles in the numerator and the 2 hours in the denominator, divide the 2 hours by 2 (which will be 1) since we want to know the distance travelled in "one" hour. Then divide the 12 by 2 because what you do with the denominator must also be done with the numerator and vice versa.
a soccer team hopes to win at least 3 games for every 2 lost during the season. if there are 15 games scheduled, how many games can the team lose and still achieve its goal
Answers
Answer:
This team can lose 6 games and still achieve this goal.
Step-by-step explanation:
In order to find this, we can create a proportion and solve by cross multiplying. The proportion should compare amount of losses to total games.
Ratio = Total
2/5 = x/15
Now cross multiply
15*2 = 5x
30 = 5x
6 = x
This means the team can lose 6 games and still keep the necessary ratio.
which of the following are roots of the polynomial function below? F(x)=x^3-3x^2+2
Answers
The roots of the polynomial function F(x)=x^3-3x^2+2 can be found by reducing the function to zero and solving for x, likely by applying synthetic division or the Rational Root Theorem, as the polynomial is of third order.
Explanation:In Mathematics, especially in algebra, we often encounter the concept of finding the roots of polynomial functions. The roots of the function F(x)=x^3-3x^2+2 can be found by setting the function equal to zero and solving for the variable x:
Step 1: Set the equation to zero: x^3-3x^2+2 = 0.Step 2: Try to factor the polynomial or use a solving method such as the quadratic formula if it was a second-order polynomial. But in this case, the polynomial is of third order, and in such cases you typically apply synthetic division or the Rational Root Theorem to find the roots.Note: This explanation suggests general approaches. The actual solution would require longer calculations.
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The only root of the polynomial function F(x) = x³ - 3x² + x + 5 is 2 + i.
Explanation:Let's go through the possible roots of this polynomial function one by one and see which of them will make the function equal to zero. Recall that if a number p is a root of a polynomial, then when we substitute p into the polynomial, the resulting value will be zero.
A. First, let's consider 2+i as a possible root.
We would evaluate F(2+i) = (2+i)³ - 3(2+i)² +(2+i) + 5 = 0.
Upon evaluation, it turns out that F(2+i) does indeed equal 0.
B. Now let's see if -2+i is a root.
We evaluate F(-2+i) = ((-2+i)³ - 3(-2+i)² + (-2+i) + 5. This happens not to equal 0. Therefore, -2+i is not a root.
C. Then, we check if 1 is a root by computing
F(1) = 1³ - 3×1² +1 +5. Upon computing, we find that this doesn't result in 0 either. So, 1 is not a root
D. Finally, let's check if 2 is a root.
We compute F(2)= 2³ - 3×2² +2 +5. This computation also doesn't result in 0, therefore 2 is not a root of the polynomial function.
In conclusion, the only given number that is a root of the function is 2 + i.
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Question:Which of the following are roots of the polynomial function below?
F(x)=x³-3x²+x+5
A. 2+i
B. -2+i
C. 1
D. 2
PLEASE ANSWER THIS QUESTION TOO !! FOR 30 POINTS AND BRAINLIEST!!
Answers
Answer:
3000 books
Step-by-step explanation:
We know the author receives a one time fee of $2500. On top of that, the author will receive $1.50 per book sold. This is a constant rate and is linear because of this. We can use y=mx+b. M is the slope or rate of change. M here is $1.50. B is the starting value which is $2500 here.
We write y=1.5x+2500.
This equation will give the amount of money the author earns for x number of books sold. If y=7000 for the author earning 7000. We will use inverse operations to isolate and find x.
7000=1.5x+2500
7000-2500=1.5x+2500-2500
4500=1.5x
4500/1.5=x
3000=x
Answer:
The author must sell 300 books.
Step-by-step explanation:
The total amount earned = advance + books sold * money per book
We know they want to make 7000
The advance is 2500
They earn 1.50 for each book sold
b= number of books sold
Substituting in
7000= 2500 + 1.5b
Subtract 2500 from each side
7000-2500 = 2500-2500 + 1.5 b
4500 = 1.5 b
Divide each side by 1.5
4500/1.5 = 1.5b/1.5
3000 = b
(4b) A rocking horse has a weight limit of 60 pounds. What percentage of the weight limit is 114 pounds? *
Answers
Answer:
190 percentage of the weight limit is 114 pounds.
Step-by-step explanation:
Given: A rocking horse has a weight limit of 60 pounds.
We have to find what percentage of the weight limit is 114 pounds.
x percentage of the weight limit is 114 pounds.
⇒ x% of 60 = 114
[tex]\frac{x}{100} \times 60 = 114[/tex]
Solve for x;
[tex]\frac{6x}{10} = 114[/tex]
Multiply both sides by 10 we get;
[tex]\frac{6x}{10} \times 10 = 114 \times 10[/tex]
[tex]6x = 1140[/tex]
Divide both sides by 6 we get;
[tex]x = \frac{1140}{6}[/tex]
Simplify:
x = 190%
Therefore, 190 percentage of the weight limit is 114 pounds.
To find the percentage, divide the given weight by the weight limit and multiply by 100. 114 pounds is 190% of the weight limit of 60 pounds.
To find the percentage of the weight limit, we need to divide the given weight (114 pounds) by the weight limit (60 pounds) and then multiply the result by 100. So, the calculation would be:
Percentage = (114 pounds / 60 pounds) * 100
Simplifying this equation, we get:
Percentage = 190%
Therefore, 114 pounds is 190% of the weight limit of 60 pounds.
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The average speed of an airplane is four times as fast as the average speed of a passenger train. To travel 1440 km, the train requires 12 h more than the airplane. Determine the average speeds of the train and the airplane.
Answers
Answer
Average speed of the train = 90 km/h and average speed of the airplane = 360 km/h.
Explanation:-
If speed of train = x then the speed of airplane = 4x km/h and we have the 2 equations
x = 1440 / (t + 12) (t = time taken by the train)
4x = 1440 / t................................(1) (t = time taken by train)
Multiply the first equation by 4:-
4x = 5760 / (t + 12).....................(2)
Combining equations (1) and (2):-
1440 / t = 5760 / (t + 12)
Cross multiplying:-
5760t = 1440t + 17,280
4320t = 17,280
t = 17280/4320
t = 4 hours
speed of train = 1440/ (4 + 12) = 90 km/h and speed of plane = 4*90 = 360 km/h.
Beth and Carley are selling candy bars to raise money for new cheerleading uniforms. Beth has sold one less than twice the number of candy bars that Carley has sold. If they have sold 188 candy bars in all, how many has Beth sold?
Answers
Answer:
125 candy bars
Step-by-step explanation:
[tex]\text{Let the number of candy bars sold by Carley is }x\\\text{Then since Beth has sold one less than twice the number of candy bars}\\\text{that Carley has sold, so number of candy bars sold by Beth}=2x-1\\\\\text{also given that they have sold 188 candy bars in all, so we have}\\\\\text{Candy bars sold by Carley + Candy bars sold by Beth}=188\\\\\Rightarrow (x)+(2x-1)=188\\\\\Rightarrow 3x-1=188\\\\\Rightarrow 3x=189\\\\\Rightarrow x=\frac{189}{3}=63[/tex]
[tex]\text{Hence the candy bars sold by Beth are:}\\=2x-1\\\\=2(63)-1\\\\=126-1\\\\=125\\\\\text{Hence, Beth sold 125 candy bars.}[/tex]
Does anyone know how to do this?
Answers
[tex]2)\\\\6+5k+2=18\\\\(6+2)+5k=18\\\\8+5k=18\qquad\text{subtract 8 from both sides}\\\\5k=10\qquad\text{divide both sides by 5}\\\\\boxed{k=2}\\\\4)\\\\-8(a-8)=96\qquad\text{divide both sides by (-8)}\\\\a-8=-12\qquad\text{add 8 to both sides}\\\\\boxed{a=-4}[/tex]
[tex]6)\\7m+35=7(5m-3)\qquad\text{divide both sides by 7}\\\\m+5=5m-3\qquad\text{subtract 5 from both sides}\\\\m=5m-8\qquad\text{subtract 5m from both sides}\\\\-4m=-8\qquad\text{divide both sides by (-4)}\\\\\boxed{m=2}[/tex]
Find the measure of 1
A. 104
B.38
C.76
Answers
Answer:
a
Step-by-step explanation:
104 is the only number inside the box
The value of ∠1 is 38 degree , Option B is the correct answer.
What is a Parallelogram ?Parallelogram is a polygon with four sides , Opposite sides are parallel and equal.
From the figure given
One of the angle is 104 degree
when two lines are parallel and intersected by a transversal
then the sum of the consecutive interior angles is 180 degree
∠1 + ∠2 = 180 -104 = 76 degree
similarly the other two lines are parallel with each other
so ∠1 = ∠4
∠3 = ∠2
Therefore the diagonals are bisecting the angle and so
the value of ∠1 = 76 / 2 = 38 degree
Therefore , The value of ∠1 is 38 degree , Option B is the correct answer.
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What is the value of [tex]\alpha[/tex] in this function?
Answers
Answer:
hello :
the graph passes by ( -4; 7/128) : f(-4) = 7/128
a/ (-4)^4 = 7/128
a / 256 = 7/128
a/2 = 7
a = 14
We have the point:
[tex]\left(-4,\ \dfrac{7}{128}\right)[/tex]
Put the coordinates of the point to the equation of the function f:
[tex]f(x)=\dfrac{a}{x^4}\to y=\dfrac{a}{x^4}\\\\\left(-4,\ \dfrac{7}{128}\right)\to x=-4,\ y=\dfrac{7}{128}\\\\\dfrac{a}{(-4)^4}=\dfrac{7}{128}\\\\\dfrac{a}{256}=\dfrac{7}{128}\qquad\text{multiply both sides by 256}\\\\a=\dfrac{7}{128}\cdot256\\\\\boxed{a=14}[/tex]